The "check engine" light comes on in my 90 300E when the car is not running and the key is removed. When the car starts, the light goes out. Can anyone offer a cause or suggestion... Thanks
1990 300E
Aug 13, 2007
1 Replies
Sounds like someone messed up on the bulb placement... that should have been for alternator trouble light... It sounds to me that your alternator regulator is shot... or the alternator itself is bad.
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