Believe I have a bad OVP relay in my California-spec 1985 300TD. Indy replaced it with a used one he had on hand, and I had a working tach for a brief period. Short time later it died, they were closed, so I couldn't go back.

Stopped off at a MB dealer, and the relay he had on hand (superseded part number) has five electrical contacts on it. My current OVP has only four plus a plastic locating pin. Dealer wanted to remove the fifth pin, I said no, credit back please, and walked away.

Looked at Fastlane and several other suppliers, but all seem to have the five contact version pictured.

The OVP socket in the car does not have a hole to accommodate that fifth contact.

Who has the four-pin OVP relay? After normal business hours so I couldn't call and talk to Phil...

Thanks in advance,
Dave