Mercedes Auxiliary Battery 000000004039 | IDParts.com - Diesel Parts
New Genuine Mercedes-Benz Auxiliary System Battery (2007-2021) OE 000982960864 - Walmart.com
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