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#1
01-13-2012, 05:41 AM
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1992 W124 OVP Help
On my 1992 300TE wagon with base engine (no 4matic).......
Just started having cold start and idle issues with both the ASR and ABS lights on. Cars runs OK with rough idle otherwise. Based everything I have read, it looks like my OVP is bad (alternator and battery are OK). The OVP in my car has one 10 amp fuse. The one I purchased on-line looks like it has two 10 amp fuses. Is this an OK switch? A newer version or something generic? If I did buy the incorrect unit, can someone point me to the correct part on-line? Thanks for the advice!! Charlie 
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#2
01-13-2012, 06:01 AM
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Charlie, check the condition of the voltage regulator brushes. If the voltage regulator hasn't been replaced in years it's likely the brushes are worn down to nubs.
__________________
Fred Hoelzle
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#3
01-13-2012, 06:06 AM
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Thanks for the quick reply.
I will replace the OVP anyway, since it is inbound. Just curious if it is an OK replacement, based on the new one having an extra fuse. I will do the regulator too regardless. I am getting 14 volts out of the alternator under load, but who knows. Where is it located and how hard is it to get out? I am assuming it is mounted to the alternator. I have never seen a regulator with bruishes... usually just some electronics.... Oh well.... Thanks
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#4
01-13-2012, 01:49 PM
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Yes, Charlie, the new style 9-pin OVP has two 10-amp fuses and is the correct upgrade for your older style relay with a single fuse.
__________________
1988 California version 260E (W124) Anthracite Grey/Palomino Owned since new and still going strong and smooth MBCA member Past Mercedes-Benz: 1986 190E Baby Benz 1967 230 Inherited from mom when she downsized 1959 220S Introduced me to the joys of keepin' 'em goin' There are only 10 kinds of people in the world--those who understand binary and those who don't
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