The OVP (over voltage protection relay) is a good part to change anyway if you have the original part.

The original part is known bad part, and the new ones have a different part number.

If you try a search, it has been discussed ad infinitum in the archives.

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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".