Mercedes-Benz A170 1.7 CDI Diesel Engine (668942) W168
The Mercedes-Benz OM668.942 is an engine code, not a specific engine number. This code refers to a 1.7-liter, 16-valve common rail diesel engine, specifically the OM 668 DE 17 LA, used in various Mercedes-Benz A-Class W168 models, notably the A170 CDI between 2001 and 2004.