There's no question that an oil-pressure-loss can be catastrophic and all you have to do is not notice that the gauge has gone to zero.

I looked into the idiot light thing, maybe with a buzzer or flasher attached to get your attention. All you have to do (on cars with mechanical gauges) is to tee into the pressure line and add an oil pressure switch connected to a warning lamp. Maybe a flashing LED would work.

For cars that have electrical oil pressure gauges, there would be a little bit more of a challenge. You would have to design and build a circuit with a transistor or an op-amp to sense the low voltage and trigger a lamp.

Shame that Mercedes didn't add to the meter needle a contact that would light a warning lamp at zero. It might be possible to retrofit such a thing, I suppose.

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970