Wife's 2015 S550 Auxiliary battery malfunction message.
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Junior Member
Joined: Dec 2018
Posts: 43
Likes: 8
From: Texas
2015 SL400
Wife's 2015 S550 Auxiliary battery malfunction message.
My wife had the auxiliary battery malfunction message today. The car is over 3 years old now so I assume it is simply time to replace it. Where is it located? Do i need to disconnect the main (starter) battery before replacing it? Any info would be greatly appreciated.
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From: on my way
2012 CLS63
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Joined: Sep 2012
Posts: 126
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2009 C350, 2015 S550
Just spent over 500 to replace main starter battery now i get the auxiliary battery malfunction.
I assume this isnt covered under CPO
Konigster just to confirm that model number you posted above does apply to the 2015 RWD S550? I found that part on fcpeuro but it says it does not fit your vehicle.
I assume this isnt covered under CPO
Konigster just to confirm that model number you posted above does apply to the 2015 RWD S550? I found that part on fcpeuro but it says it does not fit your vehicle.
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MBWorld God!
Joined: Jul 2010
Posts: 31,273
Likes: 3,916
From: on my way
2012 CLS63
Just spent over 500 to replace main starter battery now i get the auxiliary battery malfunction.
I assume this isnt covered under CPO
Konigster just to confirm that model number you posted above does apply to the 2015 RWD S550? I found that part on fcpeuro but it says it does not fit your vehicle.
I assume this isnt covered under CPO
Konigster just to confirm that model number you posted above does apply to the 2015 RWD S550? I found that part on fcpeuro but it says it does not fit your vehicle.
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Member
Joined: Dec 2018
Posts: 121
Likes: 15
2014 s63 AMG.
On my S63 AMG if you scan your gas tank lid there is a lil IRQ scan, when you scan it on iPhone it shows your battery’s locations says I have 3 battery’s one is 48 v and not sure on S550 but check to see if you have IRQ
Newbie
Joined: Aug 2019
Posts: 1
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2016 S550/2014 ML350
It’s far worse than that. Yes the start/stop won’t work, and if you attempt to turn on cruise control you get a
nice amber warning about distronic disabled. However when you when you get to your favourite stop sign where you wait a long time and press hard on the brake pedal to turn on brake hold it fails... silently... and you get to roll out into on coming traffic.
You would think that a flaw that disabled a component of the braking system on the car might just result in warning for the driver.
nice amber warning about distronic disabled. However when you when you get to your favourite stop sign where you wait a long time and press hard on the brake pedal to turn on brake hold it fails... silently... and you get to roll out into on coming traffic.
You would think that a flaw that disabled a component of the braking system on the car might just result in warning for the driver.
