I guess my question is this:

If the car does not have a tach amp, it should have the OVP under the dash, right?

Since I don't have that either, does that mean I'm missing that OVP relay?

I'll crawl underneath the car tonight (or tomorrow, might not have time tonight) to see if I can locate the tach pickup. Thanks guys, I'll post back with what I can find.

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"The MB W123 is so bulletproof, you can drive them forever. Which is a good thing as it takes that long to get anywhere."
Betsie: 1984 W123 300D (hobby, 280k miles)
Myrla: 2001 Mazda Protege 2.0 ES 5spd (daily driver, 130k miles)
The Turd: 2007 Toyota Camry (wife's car, 118k miles)