What is an auxiliary battery?
Auxiliary Battery Overview Auxiliary batteries vary in size and specification dependent on the demands placed on it by the vehicle electrical system and can be used as a safety back-up to support the main battery when required or to provide voltage for specific vehicle systems all of the time.
What does it mean when your Mercedes says auxiliary battery malfunction?
Many Mercedes Benz owners have noticed that they will sometimes get an occasional warning message on their dashboard stating “auxiliary battery malfunction” which can be quite scary especially if it happens while you’re actively driving.
What happens when the auxiliary battery goes bad?
If this auxiliary battery develops a malfunction, it will show up as an error message on the dashboard. The warning will be generic, but should feature a small battery symbol.
What to do if your aux battery malfunctions?
Click to expand… Have dealer check VMI to see if there any outstanding Service Campaigns (i.e.: 2009110003, 2010030010) for your VIN, if so repair is free even out of warranty. No open campaigns, correct battery/correctly installed need to have someone pull fault codes using MB diagnostics, may be as simple as clearing stored codes.
When does an auxiliary battery malfunction on Red Ken?
So, 8 weeks after the 3-year warranty expired, Red Ken decided to invoke the Law of Sod and throw up a “Auxiliary Battery Malfunction” warning.
Many Mercedes Benz owners have noticed that they will sometimes get an occasional warning message on their dashboard stating “auxiliary battery malfunction” which can be quite scary especially if it happens while you’re actively driving.
Click to expand… Have dealer check VMI to see if there any outstanding Service Campaigns (i.e.: 2009110003, 2010030010) for your VIN, if so repair is free even out of warranty. No open campaigns, correct battery/correctly installed need to have someone pull fault codes using MB diagnostics, may be as simple as clearing stored codes.
If this auxiliary battery develops a malfunction, it will show up as an error message on the dashboard. The warning will be generic, but should feature a small battery symbol.
Why does my aux.battery keep going dead?
Sometimes new batteries are bad out of the store because they sit too long and one of the cells go bad so you might have voltage but once you do a load test, it will show that it’s dead. The voltage of the aux. battery was 12.4 when I installed it. I do have a code scanner, no stored codes.