I have a 1990 300SE. I did not realize you should not press the Odometer reset button while the car is in motion, and it let me know by stopping working! The dash dimmer still works, but I'm sure I stripped the teeth or gearing in the mechanical part of the odometer.

Can I find out how many teeth this has for part ordering? I am assuming this is a relatively easy DIY job once I remove the cluster.

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Pete Bassett
1990 300SE, 238K Miles