123.133 / 300D Turbodiesel Sedan

00 - Maintenance, service, technical data; General descriptions; Operating instructions; General considerations concerning service products (fluids, etc.); Jacking-up, towing-off, laying-up vehicle

Intro - 123 Chassis Manual Introduction Intro - 617 Engine Manual Introduction 005 - Instructions for use of serivice manual 005/1 - Model and unit survey 005/2 - Identification of vehicles 010 - Technical Data 010 - Model and system identification 010 - Engine and vehicle identification 015 - Vehicle identification number locations 015 - Vehicle identification number locations 020 - Technical Data 020 - Technical Data 030 - Technical Data 040 - Technical Data

01 - Engine, removal and installation; Crankcase, cylinder head, engine breathing

010 - Checking compression pressure 015 - Checking cylinders for leaks 020 - Evaluation of cylinder bores 025 - Measuring oil consumption 030 - Removal and installation of engine (oil capacity) 040 - Engine breather -- functional description 110 - Measuring, boring and honing cylinder bores 115 - Renewing, boring and honing cylinder liners 120 - Facing cylinder crankcase parting surface 130 - Knocking-out and inserting steel balls for main oil ducts 140 - Replacing core hole closing cover in cylinder crankcase 215 - Removal and installation of front cylinder crankcase cover 220 - Removal and installation of intermediate flange 310 - Removal and installation of complete oil pan 405 - Cylinder head bolts and tightening of cylinder head bolts 415 - Removal and installation of cylinder head 417 - Removal and installation of pre-chambers 418 - Facing cylinder head parting surface 420 - Pressure-testing cylinder head

03 - Crank assembly

310 - Checking, renewing and tightening connecting rod bolts 313 - Reconditioning and squaring connecting rod 316 - Removal and installation of pistons 318 - Checking and reconditioning of crankshaft 320 - Mounting of crankshaft 324 - Renewing front crankshaft radial sealing ring 327 - Renewing rear crankshaft radial sealing ring 340 - Removal and installation of pulley, vibration damper and balancing disc 344 - Static balancing of balancing disc 345 - Checking and correcting adjustment of TDC transmitter 350 - Removal and installation of crankshaft sprocket 410 - Removal and installation of flywheel and driven plate 430 - Renewing ring gear of flywheel 440 - Statically balancing of flywheel 450 - Instructions for full balancing of engine

05 - Engine timing, valves

210 - Inspection and adjustment of valve clearance 215 - Inspection and adjustment of camshaft timing 220 - Removal and installation of camshaft 225 - Grinding camshaft bearing journals 235 - Removal and installation of rocker arms with rocker arm bearing brackets 240 - Renewal of rocker arms and rocker arm bearing brackets 250 - Removal and installation of valve springs 260 - Checking valve springs 270 - Replacement of valve stem seals 280 - Checking and machining valves 285 - Checking and renewing valve guides 291 - Machining valve seats 310 - Removal and installation of chain tensioner 320 - Renewing timing chain 330 - Removal and installation of tensioning rail 340 - Removal and installation of slide rails 412 - Removal and installation of intermediate sprocket shaft 440 - Removal and installation of guide wheel

07.1 - Diesel injection system

001 - Survey model -- engine -- inejection pump 010 - Operation injection pump with governor 015 - Operation engine-transmission overload protection 100 - Adjustment of idle speed and idle speed adjuster 105 - Checking maximum speed at no-load 108 - Checking injection timing (begin of delivery) with digital tester (RIV method) 109 - Checking injection timing (begin of delivery) (high pressure method) 110 - Checking injection timing (begin of delivery) (flow pressure method) 111 - Checking injection timing (begin of delivery) (position indicator RIV method) 114 - Adjusting injection timing (begin of delivery) with digital tester (RIV method) -- following checkup 115 - Adjusting injection timing (begin of delivery) (high pressure method) -- following checkup 116 - Adjusting injection timing (begin of delivery) (position indicator RIV method) -- following checkup 135 - Checking injection nozzles 137 - Disassembly, cleaning, assembly and adjustment of injection nozzles 140 - Venting injection system 145 - Checking fuel pump and bypass valve 150 - Checking vacuum shutoff for leaks 200 - Removal and installation of injection pump 201 - Installation of injection pump (with locking screw) 210 - Replacement of pipe connection, delivery valve or copper sealing ring on injection pump 220 - Replacement of vacuum control unit at injection pump 230 - Removal and installation of injection nozzles 235 - Removal and installation of fuel pump 240 - Removal and installation of injection timing device

07.2 - Carburetor system

07.3 - Mechanically and mechanically/electronically controlled gasoline injection system

07.4 - Electronically controlled gasoline injection system

09 - Air cleaner, intake air preheater; Exhaust gas turbocharger

400 - Removal and installation of air filter 425 - Checking boost pressure of turbocharger 430 - Removal and installation of exhaust gas turbocharger 450 - Functional description of exhaust gas turbocharger with aneroid compensator

13 - Air compressor, belt drives

335 - Instructions concerning renewal and tensioning of V-belts 340 - Renewing and tensioning of V-belt

14 - Intake manifold, exhaust manifold; Engine brake, emission control system

001 - Vehicle identification 050 - Operation exhaust gas recirculation 100 - Testing EGR 450 - Removal and installation of intake manifold, replacement of gasket 470 - Removal and installation of exhaust manifold

15 - Electrical system engine (ignition system, preheating system, starter, alternator)

705 - Operation of preglow system 708 - Installation preglow time relay with modified ventilation 710 - Checking preglow system

18 - Engine lubrication, engine oil cooler

005 - Oil circuit, oil pressure, pressure relief valve and oil filter 031 - Removal and installation of oil return flow line of exhaust gas turbocharger 040 - Removal and installation of oil spray nozzles 110 - Removal and installation of oil filter 120 - Checking thermostat in oil filter 125 - Removal and installation of thermostat in oil filter 210 - Removal and installation of oil pump 215 - Removal and installation of oil pressure relief valve

20 - Engine cooling system, coolant hoses, ratiator

005 - Coolant circuit and engine cooling 010 - Draining and filling of coolant -- antifreeze table width="85%" 015 - Cleaning cooling system 110 - Removal and installation of coolant thermostat 210 - Removal and installation of coolant pump 220 - Reconditioning of coolant pump 225 - Sealing coolant pump 230 - Removal and installation of coolant pump housing 310 - Viscofan coupling, temperature-controlled 420 - Removal and installation of radiator 425 - Reconditioning of radiator 430 - Checking of expansion tank closing cover 490 - Illustrated thermostat layout

22 - Engine mounting

211 - Removal and installation of front engine mounts 212 - Removal and installation of rear engine mount 220 - Adjusting engine stop -- model 123.193 240 - Removal and installation of engin shock absorber

25 - Clutch

26 - Manual transmission, power take-offs

27 - Automatic transmission

28 - Transfer case

29 - Pedals

30 - Throttle control

300 - Adjusting throttle linkage 310 - Removal and installation of engine longitudinal regulating shaft 320 - Removal, installation and adjustment of front wall regulating shaft 330 - Removal and installation of accelerator pedal

31 - Frame; Trailer operation

32 - Suspension

010 - Permissible combinations springs--shock absorbers 100 - Removal and installation of front shock absorber 110 - Removal and installation of rear shock absorber 120 - Checking shock absorber 125 - Checking alignment of front shock absorbers 126 - Checking alignment of rear shock absorbers 200 - Removal and installation of front spring 205 - Removal and installation of front spring (in combination with removal and installation of front axle half on vehicles following an accident 33-200) 220 - Adjustment of front springs 230 - Removal and installation of rear springs 240 - Adjustment of rear springs 250 - Test value of springs 300 - Removal and installation of torsion bar on front axle 310 - Removal and installation of torsion bar on rear axle 501 - Functional description 510 - Checking spring struts 520 - Checking pressure reservoir 530 - Checking pressure oil pump and level controller 610 - Removal and installation of spring struts 620 - Removal and installation of pressure reservoir 630 - Draining and filling of pressure oil system 640 - Removal and installation of pressure oil pump 641 - Conversion of suction and pressure line on model 123 with diesel engine 3rd version 645 - Replacement of radial sealing ring for pressure oil pump 660 - Removal and installation of connecting rod of level controller 670 - Removal and installation of level controller 671 - Conversion of oil lines between level controller and pressure reservoir in the event of complaints about noise

33 - Front axle

200 - Removal and installation of front axle half 300 - Adjustment of wheel bearing and play 310 - Removal and installation of front wheel hub 320 - Disassembly, inspection, repair and assembly of front wheel hub 400 - Removal and installation of steering knuckle 410 - Checking the steering knuckle 420 - Removal and installation of steering knuckle arm 425 - Checking supporting and guide joint of steering knuckle bearing 430 - Replacement of sleeves for supporting and guide joint of steering knuckle bearings 440 - Replacement of supporting joint for steering knuckle bearing 500 - Removal and installation of upper control arm 512 - Removal, disassembly, assembly and installation of lower control arm 515 - Removal and installation of brake support 520 - Reconditioning bearing of lower control arm 540 - Checking supporting joint and supporting tube of brake support 550 - Checking and reconditining bearing of upper control arm 560 - Checking upper control arm 570 - Checking lower control arm

35 - Rear axle, trailing axle

010 - Removal and installation of complete rear axle 040 - Removal and installation of front rubber bearing of rear axle suspension 050 - Removal and installation of rear rubber bearing of rear axle suspension 110 - Removal and installation of semi-trailing arm, replacement of rubber bearings 130 - Removal and installation of rear axle shaft flange, adjustment of bearings 310 - Removal and installation of coupled semi-trailing arm, replacement of rubber bearing 330 - Removal and installation of link between coupled semi-trailing arm and caliper carrier 350 - Disassembly, assembly and adjustment of wheel carrier 360 - Removal and istallation of caliper carrier and rear axle shaft flange, adjustment of wheel bearing 410 - Complete inspection of rear axle wheel location 420 - Inspection of semi-trailing arms 430 - Inspection of rear axle carrier 500 - Differentiating characteristics, installation survey for rear axle center piece 520 - Removal and installation for rear axle center piece with rear axle shafts 530 - Replacement of radial sealing ring on drive pinion (rear axle center piece installed) 540 - Replacement of radial seald ring of rear axle shaft (rear axle center piece installed) 550 - ? 550-2 - ? 550-3 - ? 550-4 - ? 560 - Reconditioning of differential 620 - Removal and installation of rear axle shaft 660 - Exchanging rubber sleeves on rear axle shaft 680 - Removal and installation of ring-shaped weight on inner joints of rear axle shafts

40 - Wheels, chassis measurements

010 - Lifting vehicle with jack 013 - Positioning of jacking-up shoes and jacks 100 - Survey rims and tires 102 - Rims 104 - Tires 106 - Tire inflation pressure 108 - Snow chains 110 - Removing and mounting of wheels 111 - Removing and mounting of wheel covers 112 - Removal and installation of holding spring or annular spring for wheel cover 113 - Removing and mounting hub cap for forged light alloy rims

41 - Propeller shaft

050 - Removal and installation of propeller shaft 100 - Removal and installation of propeller shaft intermediat bearing, replacement of radial ball bearing 200 - Replacement of centering sleve

42 - Brakes - hydraulical and mechanical system

010 - Bleeding the brake system or renewing the brake fluid 012 - Checking brake lines and brake hoses 015 - Checking the brake system for leaks 035 - Checking warning device in expansion tank 040 - Inspection or adjustment of mechanical brake light switch 100 - Removal and installation of caliper on front axle 120 - Removal and installation of caliper on rear axle 140 - Checking piston release clearance in caliper 150 - Replacement of piston seal on front axle caliper 155 - Replacement of piston seal on rear axle caliper 160 - Replacement of brake pads 220 - Removal and installation of brake disc on front axle 228 - Removal and installation of brake disc on rear axle 260 - Cleaning of brake discs 310 - Removal and installation of tandem main cylinder 315 - Disassembly, inspection and assembly of stepped tandem main cylinder 510 - Removal and installation of parking brake pedal system 515 - Replacement of rubber stop in pedal system of parking brake 520 - Removal and installation of front brake cable control 525 - Removal and installation of rear brake cable control 530 - Removal and installation of brake shoes of parking brake 540 - Readjustment or adjustment of brake shoes of parking brake

43 - Brakes - pneumatic system and auxiliary brakes

023 - Testing check valve 325 - Checking brake booster 350 - Removal and installation of brake booster 610 - Removal and installation of single diaphragm vacuum pump 615 - Removal and installation of double diaphragm vacuum pump 618 - Removal and installation of piston vacuum pump 620 - Replacing diaphragm and plate valves of single-diaphragm vacuum pump 625 - Replacing diaphragm and plate valves of double diaphragm vacuum pump 628 - Replacing piston seal and plate valves of piston vacuum pum 630 - Replacing rocker arm of single diaphragm vacuum pump 635 - Renewing rocker arm of piston vacuum pump 660 - Checking single diaphragm, double diaphragm and piston vacuum pump

46 - Steering

010 - Differentiating characteristics of steering gears 070 - Reconditioning of steering gear 110 - Checking play of steering components 120 - Checking start of manual restriction 130 - Checking oil pressure of power steering pump 220 - Reconditioning of steering gear 220-2 - Reconditioning of steering gear (continued) 310 - Removal and installation of manual steering 412 - Removal and installation of power steering 480 - Adjustment of power steering in vehicle 510 - Removal and installation of pitman arm 520 - Removal and installation of intermediate steering arm 540 - Removal and installation of track rod 550 - Removal and installation of drag link 610 - Removal and installation of steering wheel 620 - Removal and installation of jacket tube 625 - Disassembly and assembly of jacket tube 630 - Removal and installation of steering shaft 640 - Removal and installation of steering lock 640-2 - Removal and installation of steering lock (continued) 700 - Differentiating characteristics of power steering pump 705 - Renewing radial sealing ring of power steering pump 710 - Removal and installation of power steering pump 720 - Disassembly, checkup and reconditioning of power steering pump 740 - Assembly of power steering pump 760 - Removal and installation of mounting bracket for power steering pump

47 - Fuel system

700 - Removal and installation of fuel tank 705 - Removal and installation of fuel expansion tank 710 - Removal and installation of immersion tube indicator 715 - Operation of immersion tube indicator for fuel gauge 720 - Operation fuel tank positive and negative venting system

49 - Exhaust system, heat shield, outer

100 - Removal and installation of exhaust system

54 - Electrical system; Equipment and instruments; Speed control systems

005 - Battery test, service and maintenance 100 - Designation and layout of grounding points 250 - Removal and installation of instrument cluster 251 - Removal and installation of indicating instruments 253 - Removal and installation of tachometer 256 - Function immersion tube transmitter for fuel gauge 257 - Testing fuel gauge 258 - Removal and installation of time clock 270 - Pressure difference warning system wiring diagram [USA] 1977 305 - Removal and installation of rotary light switch 310 - Removal and installation of of combination switch 312 - Testing, refinishing resetting of turnsignal arm 325 - Removal and installation of turnsignal lamp and warning flasher switch with relay 326 - Layout warning flasher relay starting September 1981 340 - Removal and installation of switch console 350 - Wiring diagram special versions for fog lamp, headlamp flasher, backup lamp 390 - Renewing bulbs of control system, heater 391 - Renewing bulb for ashtray light 410 - Seatbelt warning device, ignition key, lamps [USA] starting 1978 500 - Cruise control operation 504 - Testing with adapter 506 - Testing coding plug 510 - Checking switch, control unit and line harness 515 - Checking switch 520 - Checking sensor 525 - Checking cable control 530 - Checking control unit 541 - Removal and installation of acutator 545 - Removal and installation of switch 550 - Removal and installation of sensor on mechanical tachometer 555 - Removal and installation of cable control 560 - Adjustment of cable control 561 - Adjustment of connecting rod 565 - Removal and installation of control unit 575 - Removal and installation of switch on clutch pedal 577 - Removal and installation of relay decel shutoff / cruise control 580 - Wiring diagram

55 - Auxiliary drives, hydraulic and articulated systems

58 - Tools, test instruments, equipment

60 - Body, general

61 - Understructure

62 - Front end and front wall

63 - Side wall

64 - Rear wall and rear end

65 - Roof

67 - Glass (panes) and windows

100 - Removal and installation of windshield 120 - Removal and installation of ornamental frame on windshield 200 - Removal and installation of back window 220 - Removal and installation of of ornamental frame on back window

68 - Interior equipment

100 - Removal and installation of instrument panel 105 - Removal and installation of loudspeaker cover 120 - Removal and installation of glove compartment lid 130 - Removal and installation of glove compartment lid lock 140 - Removal and installation of glove compartment 150 - Removal and installation of bottom instrument panel cover 200 - Removal and installation of center console 230 - Removal and installation of gear shift lever cover 400 - Removal and installation of reveal molding on top of windshield 405 - Removal and installation of reveal molding on windshield 430 - Removal and installation of headliner 449 - Removal and installation of rear pillar trim 458 - Removal and installation of hat rack and first aid kit 470 - Removal and installation of center pillar trim 480 - Removal and installation of trunk cover 490 - Install interior padding at bulkhead (after renewal of bulkhead) 495 - Removal and installation of cover on rear pillar, outside 510 - Removal and installation of ornamental rod on edge of front or rear door 590 - Removal and installation of trimstrips in range of entrance 700 - Removal and installation of of partition between tank and trunk

72 - Doors

100 - Removal and installation of front door liner 101 - Removal and installation of rear door liner 110 - Removal and installation of window regulator 140 - Removal and installation of arm rest with grip 160 - Removal and installation of inner sealing rail 170 - Removal and installation of outer sealing rail 180 - Removal and installation of front door window lift 181 - Removal and installation of rear door window lift 185 - Removal and installation of front door electric window controls 187 - Removal and installation of rear door electric window controls 190 - Removal and installation of front door crank operated window 191 - Removal and installation of rear door crank operated window 195 - Adjusting front door crank operated window 197 - Removal and installation of rear door fixed window 198 - Removal and installation of of flexible window running rail 210 - Removal and installation of door retainer 214 - Removal and installation of front door reveal molding 220 - Removal and installation of front or rear door rubber frame 230 - Removal and installation of front door inside controls 231 - Removal and installation of rear door inside controls 240 - Removal and installation of front door outside grip 241 - Removal and installation of rear door outside grip 250 - Removal and installation of front door lock 251 - Removal and installation of rear door lock 258 - Removal and installation of modified vacuum element 260 - Removal and installation of striker 270 - Removal and installation of exterior rear view mirror

75 - Trunk lid, fuel flap

100 - Removal and installation of trunk lid 102 - Removal and installation of trunk lid lock 300 - Removal and installation of tank flap

77 - Slide roof (sun roof), top, racks

100 - Removal and installation of sun roof lid (electric sun roof) 110 - Adjusting sun roof lid (electric sun roof) 140 - Removal and installation of teleflex cable 150 - Removal and installation of teleflex tube 180 - Removal and installation of holder with motor and gear 190 - Troubleshooting instructions for electric sun roof 195 - Checking and adjusting slip clutch of sun roof motor (round motor) 200 - Removal and installation of sun roof lid (mechanical sun roof) 210 - Adjusting sun roof lid (mechanical sun roof) 250 - Removal and installation of sun roof wind deflector

80 - Central locking system, comfort hydraulics

010 - General 020 - Design and operation of central interlock 200 - Removal and installation, as well as adjustment of vacuum switch of driver's door 210 - Removal and installation of vacuum element of front passenger's door 220 - Removal and installation of vacuum element for rear doors 230 - Removal and installation of vacuum element of tank filler neck flap 240 - Removal and installation of vacuum element for trunk lid 241 - Removal and installation of vacuum element for rear door 250 - Removal and installation of vacuum supply tank 260 - Checking central interlock 900 - Functional diagram central interlock 901 - Functional diagram central interlock and air conditioning system 902 - Functional diagram central and seat backrest locking system with air conditioning system

82 - Electrical system body; Radio, windshiold washer system, light range regulator

052 - Removal and installation of lamp unit 062 - Removal and installation of lamp unit bulbs 252 - Removal and installation of tail lamp unit 348 - Removal and installation of license plate lamp 500 - Connection for radio 530 - Function of automatic antenna (USA) starting 1977 610 - Removal and installation of wiper arm 620 - Removal and installation of wiper blade 625 - Removal and installation of wiper blade rubber profile strip 630 - Removal and installation of wiper linkage 680 - Removal and installation of wiper motor 780 - Wiring diagram roar window wiping washing system, 2nd version 800 - Operation of seat heating system 810 - Checking seat heating system 820 - Removal and installation of pushbutton switch for seat heating system and renewing bulb 830 - Renewing heating pad of seat heating system

83 - Climate control

100 - Removal and installation of heater box 110 - Removal and installation of heat exchange 112 - Removal and installation, adjustment of bowden wires on water valve for heater 113 - Removal and installation, adjustment of bowden wires on water valve for heater 115 - Removal and installation of water valve for heater 120 - Removal and installation of heater blower 140 - Removal and installation of ornamental grille on air inlet 150 - Removal and installation of ring nozzles right or left on instrument panel 256 - [520] Removal and installation of electromagnetic clutch 500 - General description and operation of air-conditioning system 502 - Regrigerant circuit 504 - Safety measures 506 - Repair instructions for air-conditioning system 508 - Control of air-conditioning system 510 - Function test and quick test of air-conditioning system 512 - Leak test and evacuation 514 - Refilling or replenishing air-conditioning system 516 - Draining of air-conditioning system 518 - Cleaning of air conditioning system 520 - Checking oil level in refrigerant compressor 522 - Removal and installation of refrigerant compressor 524 - Reonditioning of refrigerant compressor 526 - Removal and installation of electromagnetic clutch 528 - Removal and installation of condenser 530 - Removal and installation of receiver dehydrator 532 - Removal and installation of pressure switch or temperature switch in receiver dehydrator 534 - Removal and installation of expansion valve 536 - Removal and installation of evaporator housing 538 - Removal and installation of evaporator 540 - Removal and installation of blower 542 - Removal and installation, adjustment or checkup of temperature vacuum switch or temperature dial and temperature sensor for air-conditioning system 544 - Removal and installation of vacuum elements 545 - Checking vacuum elements and temperature vacuum switch for leaks 546 - Removal and installation of supplementary fan 600 - Operation of automatic climate control 601 - Manual and optical function test of automatic climate control 602 - Preparation for test, connecting adapter to volt/ohm measuring instrument 603 - Function test of total system and remedies (with adapter) 604 - Vacuum function diagrams 607 - Output test 614 - Preparations for vacuum test 615 - Testing check valve and vacuum reservoir 620 - Testing vacuum circuit I, II and III 622 - Testing vacuum circuit IV, V and VI 624 - Testing vacuum circuit VII 625 - Removal and installation of mono valve 628 - Testing switchover valves 630 - Removal and installation of recirculating pump 635 - Removal, installation and disassembly of control unit 640 - Removal and installation of in-car temperature sensor 643 - Removal and installation of air jet nozzle 645 - Removal and installation of temperature sensor for heat exchanger 650 - Removal and installation of ETR switch 660 - Removal and installation of switchover valves 665 - Removal and installation of vacuum elements 675 - Removal and installation of electronic switching unit for temperature control 676 - Removal and installation of electronic switching unit for blower control 678 - Removal, installation and checking of temperature switch for cold-engine lock

86 - Emergency equipment, sanitary equipment, kitchen

88 - Attachments, outside flaps

100 - Removal and installation of front fender 200 - Removal and installation of front bumper 205 - Remove and install rubber cover at front bumper 220 - Removal and installation of rear bumper 222 - Removal and installation of rubber cover on rear bumper 300 - Removal and installation of engine hood 305 - Removal and installation of engine hood support 306 - Removal and installation of engine hood hinge 310 - Removal and installation of cable control for engine hood 400 - Removal and installation of radiator shell 401 - Removal and installation of radiator grille 402 - Removal and installation of trim strips to radiator grille 405 - Removal and installation of Mercedes star 410 - Removal and installation of air flow grille under front bumper

91 - Seats, cots, restraint systems

100 - Removal and installation of front seat (driver's seat) 110 - Removal and installation of front seat (passenger's seat) 120 - Removal and installation of reclining seat fittings 165 - Removal and installation, reconditioning of folding armrest for driver's seat 170 - Removal and installation of rear seat and rear seat backrest 300 - Remedy for electrostatic charge on seat 500 - Removal and installation of safety belt 550 - Exchange instructions for safety belt

94 - Body noises, sound insulation

97 - Body sealing, anti-corrosion protection

98 - Paintwork

99 - Technical literature; Validity list, administration

MM - Maintenance Manual

Intro - Maintenance Manual Introduction 0050 - Inspecting component condition 0051 - Inspecting condition of lines and hoses 0053 - Inspecting components, lines and hoses 0090 - Suspension and body structure inspection 0091 - Water leakage and corrosion inspection 0101 - Engine oil and filter change 0560 - Adjusting valve clearance 0561 - Checking valve clearance 0750 - Checking and adjusting idle speed 0758 - Checking and adjusting idle speed 0760 - Checking injection timing 0761 - Adjusting injection timing 0780 - Replacing fuel filter 0781 - Replacing fuel prefilter 0932 - Cleaning metal-reinforced air filter element 0980 - Replacing air filter element 0981 - Replacing air filter elements 1350 - Checking condition and tension of V-belts 1351 - Inspecting poly-V-belt 1470 - Checking intake/exhaust manifold seating 1480 - Replacing oxygen sensor 1550 - Check spark plugs, replace if necessary 1580 - Replacing sparkplugs 2010 - Checking coolant level/antifreeze protection 2011 - Checking coolant level 2050 - Checking cooling and heating system 2080 - Replacing coolant 2290 - Adjust engine stop, retorque engine mount bolts 2291 - Adjust engine stop 2551 - Checking clutch disk for wear 2601 - Manual transmission oil change 2610 - Manual transmission, checking, correcting oil level 2702 - Automatic transmission fluid and filter change 2710 - Automatic transmission, checking, correcting fluid level 2801 - Transfer case fluid change 2810 - Transfer case, checking, correcting fluid level 2910 - Clutch system, checking, correcting fluid level 2950 - Clutch system, inspect 3022 - Inspecting, lubricating throttle linkage 3052 - Checking and adjusting idle speed adjuster 3211 - Level control, ADS, ASD, 4MATIC, fluid level 3251 - Inspecting self-leveling suspension 3310 - Front axle, checking, correcting oil level 3353 - Checking front axle ball joints 3355 - Checking ball joints using special tool 3501 - Rear axle oil change 3510 - Rear axle, checking, correcting oil level 3565 - Rear axle mount, adjusting limiting stop 4050 - Inspecting/rotating wheels 4051 - Inspecting tires 4060 - Correcting tire pressure 4070 - Tightening wheel bolts 4152 - Inspecting drive shaft flexible coupling 4210 - Checking brake fluid level 4250 - Inspecting brake lines for damage 4251 - Checking brake pad/disk thickness 4252 - Inspecting, cleaning brake disks 4256 - Inspecting parking brake cable 4261 - Adjusting parking brake 4280 - Replacing brake fluid 4290 - Brake test, parking brake check 4611 - Check power steering fluid level 4650 - Checking steering play 4671 - Retightening steering bolts 4750 - Checking fuel system condition 4970 - Retightening exhaust flange 4971 - Retightening exhaust system connections 5410 - Checking and correcting battery fluid level 5451 - Checking warning and indicator lamps 6030 - Cleaning water drains 6190 - Removing and installing engine compartment lower panel 7220 - Lubricating door hinges 7221 - Lubricating door locks 7710 - Hydraulic top, checking and correcting fluid level 7730 - Sun roof, clean and grease rails 7750 - Soft top, checking locking tabs 8210 - Checking, correcting windshield washer fluid level 8230 - Cleaning cassette deck tone head 8231 - Cleaning antenna mast 8251 - Headlamp and exterior lamp inspection 8252 - Windshield & headlamp wiper/washer inspection 8280 - Replacing windshield wiper blade 8312 - Checking, correcting A/C refrigerant charge 8381 - Replacing dust filter for heating/ventilation 8382 - Replacing active charcoal filter 8383 - Replacing recirculating air filter 8820 - Lubricating folding side mirror 8821 - Lubricating hood 9150 - Inspecting safety belts for damage 9151 - Backrest lock - check operation 9490 - Removing and installing lower noise encapsulation panels 9850 - Checking body for paint damage

OM - Owner's Manual

Intro - Introduction 08 - Instruments and Controls 10 - Instrument Cluster 12 - Keys and Locks 13 - Central Locking 14 - Anti-Theft Alarm System 15 - Adjustment of Driver's Seat and Front Passenger Seat 16 - Seat Heater 17 - Safety Head Restraints 18 - Armrest 19 - Seat Belts (300CD) 21 - Seat Belts (300D) 24 - Steering Lock 25 - Lighting Switch 26 - Combination Switch 27 - Cruise Control 28 - Automatic Climate Control 33 - Mirrors 34 - Sun Visors, Heated Rear Window 35 - Interior Lamps 36 - Power Windows 37 - Lighter, Sliding Roof 38 - Radio 46 - Hood 47 - Have the following items checked regularly and prior to any long trip 48 - Parking Brake, Starting and Turning off the Engine 50 - Starting and Shifting Gears 52 - Safe Driving 54 - Safe Driving (continued) 55 - The First 1500 km / 1000 miles, Special Operating Conditions 56 - Special Operating Conditions (continued) 58 - Mercedez-Benz Maintenance System 59 - Spare parts, Cleaning and Care of the Vehicle 59a - Spare parts, Cleaning and Care of the Vehicle 64 - Ash trays, Rear Seat Cushion 65 - Bleeding the Fuel System; Turning off Engine Manually 66 - First Aid Kit; Luggage or Ski Racks; Spare Wheel, Jack, Vehicle Tool Kit 67 - Wheels, Tires 68 - Changing Wheels 69 - Engine Oil Level Check 70 - Checking Coolant Level; Adding Coolant 71 - Automatic Transmission Fluid Level 72 - Headlamp Adjustment; Replacing Bulbs 76 - Fuses; Battery 77 - Emergency Operation of Sliding Roof; Unlocking of the Filter Flap 78 - Tow-starting and Towing the Vehicle 79 - Jump Starting 82 - Identification Plates 83 - Vehicle Data Cards; Warranty Coverage 84 - Technical Data 86 - Fuels, Coolants, Lubricants, etc. Capacities 91 - Service Literature 92 - Consumer Information

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Ref: Frank Mallory's database and https://mercedes-benz-publicarchive.com