C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Battery draining (due to cluster)

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Old Sep 24, 2014 | 05:29 AM
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burtonite's Avatar
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mercedes c240 2002
Battery draining (due to cluster)

Hey All

I know there are plenty of threads on this but I read almost all and did not help me.

I have a 2002 C240. About a year ago, I woke up and my battery was dead. I went to a mechanic and he sold me and expensive new battery. Two days later, it was dead too. The same guy tried to sell me alternator but I got it checked at several places, both battery and alternator are fine.

The interval of battery death got shorter and shorter and now it lasts only 2 hours. I am using a portable jump start and it is too annoying.

Finally a Mercedes place I kind of trust told me that it is cluster that drains battery (new one is $2,000 and a repair is $800). For a car, that is at most $2000, of course I don't want to pay this.

My problem is definitely not the seats by the way I tried it.

Anyways, when I remove fuse 42 (fuse for cluster) all the lights that were not working starts working again (any interior lights such as lights on windows button, lights of AC etc). Also, when fuse is not removed and if I turn beams on, light of radio fades as well but with removal of fuse 41, radio's light became bright again.

So, did any of you ever experience this before? Especially cluster's being blocking many interior lights? Any cheaper solutions you would suggest?

I would truly appreciate it.

Thank you all!
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Old Oct 6, 2014 | 03:58 AM
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C240 W203
Im having the same problem with my C240

See my post below.

https://mbworld.org/forums/c-class-w...-clusters.html

I have also not had any replies to my post.

Jon
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Old Oct 6, 2014 | 11:25 AM
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2013 C63 Coupe
So I am not sure what you mean by cluster, but presume you me the fuse box? Of so, that kind of makes sense to me. Some folks like to steam clean their engines; something I don't do... Water gets into connectors and or even the fuse box and over time corrosion sets in... Appears you have a direct short to ground.
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Old Oct 6, 2014 | 12:12 PM
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mercedes c240 2002
Originally Posted by sinape62
So I am not sure what you mean by cluster, but presume you me the fuse box? Of so, that kind of makes sense to me. Some folks like to steam clean their engines; something I don't do... Water gets into connectors and or even the fuse box and over time corrosion sets in... Appears you have a direct short to ground.
With cluster I mean the panel that shows the mileage, and all other displays. It works by fuse #42. I don't know if the problem is the fuse or cluster itself but the guy at repair shop said cluster. I think I'd better get a second opinion.
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