I'm a "new" owner myself with quite a few years of truck diesel experience but none on Mercedes. I thought they were complex at first but it ends up they are just "unfamiliar". Many of the troubles I see here seem to revolve around age related stuff wearing out like hoses and whatnot. Keep the vacuum and fuel return lines in good shape, injectors and nozzles calibrated and the cars seem to do very well.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250