Interesting relationship that OVP can have. On diesels the lack of a OVP output turns off the EGR transducer which creats the engine speed signal for the tach and the Klima.

I can't think of any such relationship on a gas model. The OVP should not be involved with the car in question.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician