I did search the archives quite thoroughly leathermang. I read that thread you linked to but did not see anything referring specifically relating to my problem.

The reason I am looking for an OVP relay is that my car does not have a tach amp. I was instructed to take a look at the OVP relay but I cannot locate it. Is it possible to not have a tach amp and OVP relay on a w123 1984 300TD?

Thanks.

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"Gerwalt" 1984 - 300TD