I have a 2000 ML320 and when cold she runs like a pig. The running gets better when she warms up but still not on the money. If I let her warm up or turn her on and off a few times it gets better but still very lumpy a bit like losing half the cylinders. Any ideas?
Chris

 

It sounds like a lot of misfiring going on your engine. Is your check engine light on or any codes stored in history? She is almost 10, you may have to get used to it! I believe they all run thatway, even with new plugs, coils, wires, injectors and CPS. Regards,
Bernard