Dash board sign shows, picture of a battery in red light," visit to work shop".

thomas, you have to get someone to scan your car and check for any codes in the battery module. if you get a aux.battery code then it is the the little battery under the hood, not the one in the truck or under the seat. i'v change alot of these batteries in the E- class. hope this helps.

under the hood on your nothwest corner open the filter under the filter there is a little batery, you just need to change it and your problem will be solved , may be you will need to reset it , but that is it.. batery may cost you from $100. or $ 150. depends where you are,, good luck

possible battery needs to be charged