I have a 2011 ML350 Bluetec
My wife was finishing off the last tri-mester of pregnancy and by default not driving her ML with a 4 year old battery for a quite a while. A few weeks back I tried to start the car. I had electricity but not enough to start the engine. With the birth of our boy I have not had a chance to address the issue for 3 weeks. So this week I went remove the battery and of course it is completely dead....Super Dead! Trickle charger does nothing much and a jumpstart doesn't work. Without any electricity to power the passenger seat motor to move the seat forward I can't remove the battery. Any Advice??? Is there something I am missing about being able to charge the battery?? Any weird Mercedes quirks I should know?

 

Hello and welcome to the forum! How long did you have the trickle charger on there? A 4 year old battery isn't that old and should be able to keep a charge after some time.

 

It trickled for a over 24 hours. The charger showed 100% but then when I disconnected the charger and reconnected it ...it went back to zero percent. All that seemed to function was the alarm red light on the inside and soon it went away also.

 

So I left it on the trickle charger for another 24 hours. Am I going to have to purchase some T45 tools and remove the seat? Is there any kind of work around for this?