I forgot to mention that when the blower motor is running after the key is out of the car, the climate control display is completely off. If I pushed the REST button, it seemed to work correctly. Then, if I pushed REST again to turn it off, the blower would kick on again 15-20 seconds later, again with the climate contorl display off.

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Mark S.
Seattle

1998 Mercedes S420, Smoke Silver, 138K