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Possible wiring issues?

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Old Jan 18, 2012 | 03:19 PM
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M-Rods's Avatar
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2013 C350 Previous: 2004 CLK 500, 2001 CLK 430
Possible wiring issues?

Hi everyone,

I have a 04 CLK 500, 130k. I've had it for a year now and everything has been great, until now.

It started with random warning messages for tail light being out. I changed the bulbs and the messages come back. Then the battery wouldn't hold a charge so I put in a new one, but that is not the problem. The SRS light is on now and I continue to get different messages from light being out to the display defective, SRS warning to the car just wont start. Sometimes the seat controls and steering wheel adjuster works and sometimes not.

Any ideas. Could it be wiring or a relay or even the alternator?
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Old Jan 18, 2012 | 04:07 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Sounds like an alternator/regulator problem. Have it load checked.
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Old Jan 18, 2012 | 04:09 PM
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Thanks, I was hoping not to hear that, lol. Most garages can do that? My MB dealer is about an hour away.
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Old Jan 18, 2012 | 05:03 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Any good auto electrician can do that. You need to get an OBDII scanner onto the car & see what codes it is storing. The warnings you are getting are typical low voltage. It could be something like like a seat module not going to sleep & running the battery down - quite common - so is the aircon sniffer fan in the overhead console.
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Old Jan 18, 2012 | 05:22 PM
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Wow, thanks for the info, Ill keep you guys posted.
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Old Jan 18, 2012 | 06:39 PM
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Corrolla
Originally Posted by Glyn M Ruck
Any good auto electrician can do that. You need to get an OBDII scanner onto the car & see what codes it is storing. The warnings you are getting are typical low voltage. It could be something like like a seat module not going to sleep & running the battery down - quite common - so is the aircon sniffer fan in the overhead console.
My friend 05 CLK500 has the same problem...he unplugged the modude just to test , no more messages.
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Old Jan 18, 2012 | 07:11 PM
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So he has left the seat module unplugged?
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