Since my throttle actuator went bad, I have researched and followed most threads that have questions with these units.

I have found that there are two reasons why these units go bad:

1. there are potentiometers that wear out.

2. the wiring harnesses, especially on 1992-1993 models, go bad. The insulation that Mercedes used was sub-standard, and flakes off, causing the wires to short out.

I was under the impression that neither of these can be replaced separately.

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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".