Mercedes GLK Auxiliary Battery Malfunction: Where is it? How to Fix it? - YouTube
Fix Mercedes-Benz Auxiliary Battery Malfunction
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Auxiliary battery malfunction - can anyone shed some light on this and what they've done in this situation? Everything works incl. stop start etc…GLC250d, 2015 : r/mercedes_benz
Fixing the “Auxiliary Battery Malfunction” Warning in a Mercedes — EurAuto Shop
Auxiliary Battery Malfunction How To Repair DIY - YouTube
Does your Mercedes vehicle have one battery – or two?
Used 2013 Mercedes-Benz GLK 350 in Carson, CA - Hyundai Carson