Which engines have a single row timing chain?
M180 230 (W114)
M180 230.6 (W114)
M123 250 (W123)
M102 up to 1988 (W123,W124,W201except 2.3-16 version.)
M103 300E/CE/TE (W124)
M116 380SE/SEL/SEL Only early crap US version.
1968 W114 250
M180 230 and 230S (W111 65-68)