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Auxiliary Battery


New Member
Hi All

I bought my 2017 MP earlier this year and after a couple of long drives and a day charging vis an electrical hook up my aux battery is only showing 50% charged.

I have a few questions if anyone can help.

1 Is this normal?
2 Can I change the battery myself?…. If so, is it a standard 12V car battery?
3 If I go to a Mercedes dealer how much will they charge?

Thanks…….. Des