So last night..I left my lights on. Silly I know, so this morning when I woke up..tried to go to work. The keyless entry didn't work, so I thought something was wrong. Checked the steering wheel and couldn't figure it out...until I saw the knob to turn on the lights was still on...

so this is my moms car..and I've never really dealt with mercedes. (BTW its an 1998 E430 sedan). How would I go about charging the battery? I don't even know how to get to the under the backseat hiding battery

 

Inside the engine is a Positive terminal and ground stud in driver side engine compartment, near the shock mount. pop the cap with the red positive symbol off and there a postive terminal inside. use the gound stud next to ot or any ground on the car. . Very easy to fine, just look inside your engine compartment. good luck

 

thanks for the quick response!