560 sel 1988 over voltage relay ??
 

I think I found my problem or part of it anyway.. The OVR seems to be the problem when you tap it the engine idle goes crazy and then calms down... I pulled it off and when you shake it it sounds like there are parts rolling around inside of it, which is probably not good...

The problem is that this relay is different from the ones I have seen for sale on the net that are suppose to fit my car.. it does not have the red top although it has the 10 amp fuse it is larger
and appears to be a 9 post instead of a 6 post unit (all the post are not in mine it does have small post which says 15 on it).. I can't read the part number it is rubbed off... I have a spare one with red top on it and it will not plug in...

Any help would be appreciated...

Jerry

Jerry
MB has changed this part many times. The appearance will be different, along with the number of pins on the bottom, and the part number. I wouldn't let the appearance be a hinderance. The extra pins are for other models equipment.
The possible problem in getting you spare installed is maybe you don't have it aligned correctly, it will only plug in one way.

Gilly