Joe P. I guess it would be called the "limp home" mode. I thought the new harness would fix it, according to posts I had seen on the board. Yet I drove it for an hour yesterday and it was fine. It is still an intermittent problem. Here are the symptoms: Car starts easy and runs perfect for a few miles until it reaches operating temperature. I pull up to a stop sign and then as I take off it stumbles and hardly runs, even though the gas pedal is about halfway to the floor. Then, after creeping along for a half block or so, it surges ahead with what feels like normal power. If I had a shop manual on this car I could likely find the problem but just guessing about how Mercedes does engine management things is sort of flying blind. Sure a different approach than what I am used to (BMW). Thanks for your thoughts.

Garry

400E
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