Our 1996 C250 diesel (no turbo) performs exactly as specified by MB re
performance, economy etc and has now covered 133,000 k's (80,000 miles).
However,cold starting is rough and becoming more so. Glow plugs are not
indicating as the problem as dash light remains on and goes off exactly as
Our workshop manual suggests maintenance of injectors at 100,000 k's
(60,000 miles) should be provided. Mercedes Benz garage reponse is "Never
touch the injectors, usually."?
Our diesel is poor (high sulphur) but improving vastly soon. Only slight
smoke when pulling very hard and starts very smoothly when just a little
warm. Rough cold start is as if only a few cylinders firing and whitish
smoke emitted. A little bit of throttle quickly clears up problem.
I have no doubts a diesel shop could fix without problem but we rather
like looking after this magnificent piece of engineering ourselves. Can
anyone help and by the way the cold start ambient temps are presently
around 10 degrees fahrenheit. Many Thanks