Hello, my father didn’t drive his W220 2 weeks because of vacation, when he wanted to open it now nothing went anymore… Then opened the suitcase with the closures (electric rear cover) and measured the battery, she still had 3.25 V voltage… Did they want to charge, but didn’t go anymore so we had to buy and install a new one. How does it know that a 95A battery is empty after 2 weeks?? She is also only 2 years old and never had any problems with her. lg Marcel