Auxillary battery malfunction
Thread Starter
Member
Joined: Dec 2014
Posts: 168
Likes: 1
C63
Auxillary battery malfunction
Hi guys, on my way home, I got a message on the dash "Auxillary battery malfunction"
Car is still under warrenty so call to dealer tomorrow.
Anyone know what the issue is?
My car is a 2015 C63s Sedan.
Cheers!
Car is still under warrenty so call to dealer tomorrow.
Anyone know what the issue is?
My car is a 2015 C63s Sedan.
Cheers!
MBWorld Fanatic!
Joined: Jan 2017
Posts: 1,117
Likes: 182
Mercedes-Benz E63s AMG
Wow... what did the dealership say about that? What a shame... such a great car, yet so many customer service issues popping up on this forum... of course, that's the point of the forum, but still. Sad to see these issues are not being addressed better by MB.
Junior Member
Joined: Jun 2016
Posts: 40
Likes: 4
From: West Palm Beach, FL
2015 C63S Edition 1, 2018 BMW M2 6MT, 2016 Volvo XC90 R-Design
I saw this on my 2015 C63S a few weeks ago. Brought it to dealer, and they change the auxiliary battery. No recurring warnings, to this point.
Super Member
Joined: Jun 2015
Posts: 643
Likes: 92
From: Houston, TX
'15 C63S
Just had the "Auxiliary Battery Malfunction" pop up on my dash this morning. I traded texts with my service rep at the MB dealership, and she said it's the battery used for "Eco Mode" which I'm assuming is what supplies the charge for the stop/start feature. She said the car should operate normally (as long as I'm not using that feature) and that there is no immediate rush to take it in right away.
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Junior Member
Joined: Jun 2016
Posts: 40
Likes: 4
From: West Palm Beach, FL
2015 C63S Edition 1, 2018 BMW M2 6MT, 2016 Volvo XC90 R-Design
Just had the "Auxiliary Battery Malfunction" pop up on my dash this morning. I traded texts with my service rep at the MB dealership, and she said it's the battery used for "Eco Mode" which I'm assuming is what supplies the charge for the stop/start feature. She said the car should operate normally (as long as I'm not using that feature) and that there is no immediate rush to take it in right away.
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Thread Starter
Member
Joined: Dec 2014
Posts: 168
Likes: 1
C63
My stop/start hasn't worked for months. Been in the dealer many times. Had an active engine mount changed, the main battery changed, software updates etc., only to have the car returned with it working (Icon green) then a few days later, back to yellow. Its been yellow now since June! I can drive an hour, do 100 miles and it might work.
I am wondering if this "Auxiliary battery malfunction" is actually the original reason its never worked?
I am wondering if this "Auxiliary battery malfunction" is actually the original reason its never worked?
Junior Member
Joined: Jun 2016
Posts: 40
Likes: 4
From: West Palm Beach, FL
2015 C63S Edition 1, 2018 BMW M2 6MT, 2016 Volvo XC90 R-Design
Well, I HAD no issues... Auxiliary Battery Malfunction light came on, again, only a couple of weeks after it was serviced. Back to the dealer I go.
Junior Member
Joined: Oct 2015
Posts: 55
Likes: 4
From: Greater Sacramento
2016 c63
Ive had my auxiliary battery malfunction for a couple weeks now. I had it a couple months ago but it went away. Just returned again a few weeks ago. My "eco" button still works. Car will turn off when at a stop (god I hate this feature). Any ideas what could be wrong?
MBWorld Fanatic!
Joined: Jun 2019
Posts: 1,453
Likes: 399
From: Flat Earth
AMG C63s Sedan , AMG C43 , AMG G63 , GLK 250
Senior Member
Joined: Jun 2019
Posts: 279
Likes: 63
From: Long Island NY
c63s
Mine came on about two weeks ago. I also got key fob battery low message around same time. I changed the key fob battery and the auxiliary battery malfunction message went away. Hopefully the auxiliary malfunction doesn’t come back. MB service charges $280 to $450 after making some calls.
