Last night I was in the turning lane, waiting for the light to change, and I noticed that my speedometer was repeatedly "revving" from zero to forty. I was at a complete standstill and the engine tach was registering a rock-solid 6k rpm (where it's set). I pulled over and let the car "take a break", and it hasn't done anything like it since, but it weirds me out.

Time for a new instrument cluster or something more sinister at play?

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Ethan Hunter
1986 Mercedes-Benz 300SDL (263,000 miles)

You mean 600 RPM, not 6000 RPM, I assume. I'd hate to have one of those idling 6000 next to me (can it even safely reach 6000?) .

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

yes, 600rpm. my bad.

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Ethan Hunter
1986 Mercedes-Benz 300SDL (263,000 miles)

well, the speedometer is electronic, I'd check the grounds to the body, check the ground contacts on the cluster, and check the speedo transmitter on the transmission.

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