Do we have a secondary (AUX) battery in our C63s?
Thread Starter
Senior Member
Joined: Sep 2011
Posts: 302
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From: CA
E63 M157
Do we have a secondary (AUX) battery in our C63s?
I did a quick search & couldn't really find any information regarding this. It seems that some Mercedes models had a smaller secondary battery that needs replacing sometime in the future. I have just replaced my alternator & my main battery is in great condition, yet I still get the red battery light that comes on & I'm afraid that it'll leave me stranded again. If we do indeed have a second battery, that is probably my culprit. Does anybody know? Thanks
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Joined: Feb 2010
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
I don't think the C63 has an auxiliary battery. If you are still getting a red warning light then I think you still have a problem. Check to see if there are any codes in the OBDII and go from there. If you are still under warranty check with the dealer or whoever replaced your alternator.
