Question about 1998 Mercedes-Benz CLK

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Several secondary electrical systems not working -- 1998 CLK

Over a period of a few days, several systems have quit working. The fuses seem to be holding, but the wipers, turn signals, horn, power seats, window lifts, power outside mirrors, interior lights, light delay and remote power locks are all inoperative.

Several other systems, including air, radio, phone, cruise control, brake lights, sun roof, vanity mirror lights and key locking are still working.

I'm now almost a hundred miles from the nearest M-B dealer, so a home remedy or something a small town shop can do would really help.

Posted by BennyDog on


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They can check the battery and the charging system for starters. Fully charged battery,clean cables. then do a load test on the battery. If it didn't pass the test replace it and check the charging system.
Charging system easy to check , Put voltmeter on battery terminals and monitor vehicle's voltage with and wthout accessories on. should be between 13.5 to 14.5v . Before condemning alternator inspect wiring behind alternator ...if corroded replace then retest.
If voltage is with range then the problem is in the power distribution compartment/ relay, or either is a ground all those items share.

Posted on Mar 18, 2010


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