i need help guys...i left my lights on the whole night. this morning, i was trying to start up my car. it was completely dead. no keyless, no lights on the dash, no horn, no everything. i tried jump starting it, but it still didnt work. all i heard is a click noise. im assuming my battery is completely drained then. what should i do? i need your help guys.

NOTE: my neighbor told me that i should use a heavy duty jumper cable. is it has something to do with that or what?

 

if you aren't sure, remove the battery, take it to pep boys and have them test it for you...check the fuses as well?

 

You don't say what year your affected car is. You may also have to do some of the following in this string: http://www.benzworld.org/forums/w208...procedure.html