My mother has a 1999 E430, and she had a very similar problem as yours.

Replacing the crankshaft position sensor solved the problem.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

Suggestions:

1) Fuel pressure regulator (relatively inexpensive)

2) Try a known good throttle actuator

If the above items have been eliminated as possible contributors to your "hot/warm running" complaint please let us know. I have a few more thoughts but if I were working on this complaint I would focus my attention on these two areas.

The crankshaft sensor went south on mine and there were no codes,this was a 129 though

Perhaps you can enlighten the forum regarding your progress....................

Always