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
Auxiliary Battery Malfunction: What Does It Mean & How To Fix - Mechanic Ask
2016 Mercedes S550 - Auxiliary Battery Message
Auxiliary Battery Malfunction - General Mercedes-Benz Chat - SGMerc - Mercedes-Benz Enthusiast Club Singapore