Question about Mercedes-Benz S-Class
Battery died lights left on for a couple days got a jump car started up did not go anywhere just ran for awhile. Next day car wont start key wont even unlock doors. Opened door with little key and lights inside would flash as well as headlights but key wont turn in ignition at all. Battery tested was okay disconnected battery so lights would not flash replaced key battery. Couple days later connected battery again and still nothing now lights will not even flash key still wont turn. Bought brand new battery installed still nothing completely dead.
Posted by Anonymous on
I'm not a car mechanic, but, it sounds like you might want to check the fuse to the ignition switch, and, if that fails, it might be a problem with the Start Safety Switch on the transmission. Good luck.
Posted on May 03, 2017
SOURCE: 2003 Impala - mystery problem???
you have something thats staying on with power when you shut the car off,first check all lights glove apartment,underhood,in trunk ,just because ther closed doesnt mean the light is off,check your car at night it might help to see the lights,if not another way is to take a multi meter to the battery and while some holds the meter pull out fuses in your fus box one at a time to see when the meter makes a change,this will help you to narrow down whats staying on and draining the power from the battery,if this helps please give me a fix ya vote
Posted on Jul 14, 2008
First, DON"T check your alternator that way anymore. It's not good to do on newer systems! The best, quickest check I can tell you is to put a volt meter across the battery. Running with accessories off you should see voltage of about 13.5 to 14.5.
With all accessories and headlamps on high turned on, it should not drop below 12.5. (and that is the absolute low end!).
It sounds like something in the car is staying on. check the glovebox light and interior light delay and make sure they are OK. Otherwise, you will have to start checking entire system for a draw that's taking out the battery overnight. To check, you can pull one fuse at a time and see if draw goes away, then check system that fuse serves.
Posted on Jan 07, 2009
Unit has a draw somewhere that needs to be addressed. I have found the auto starts sometimes can cause this. But if the draw is through the negative side it could be tough. You should take it to the dealer and have them perform a draw test on the entire vehicle.
Posted on Mar 03, 2009
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