All electronics shut off while driving
Thread Starter
Junior Member
Joined: Nov 2021
Posts: 23
Likes: 4
2003 s55, 2002 clk55
All electronics shut off while driving
Hello everyone, I have a 2003 s55 that i recently purchased. it drove great for the first couple 100 miles but recently it’s been having a electrical issue. As i’m driving the dash will give out a red message saying check battery and all the lights get dim. moments later the ac will turn off, the windows won’t be operable, the radio turns off and whatever gear i am in at that time i am stuck in. within a minute it usually goes back to normal but it is very annoying and honestly quite dangerous. if anybody knows what the solution is or what it could be related to i’d greatly appreciate the help.
Senior Member
Joined: Dec 2010
Posts: 282
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From: Virginia Beach
2005 S600 2005 SL600
I would start by checking the charging voltage from the alternator, and then I would check the battery itself. This car doesn't like weak batteries, and I would go with an AGM, as originally fitted, not a regular lead-acid, battery.
Thread Starter
Junior Member
Joined: Nov 2021
Posts: 23
Likes: 4
2003 s55, 2002 clk55
thank you for your help, i got the battery checked at oreily but i’m just going to replace the battery and see if it fixes the problem as well with my keyless go.
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Joined: Jan 2008
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Mercedes
No .
you need to do exactly what was said - check charging voltage while car is running and showing the error . It sounds like your alternator brushes are worn and once the alternator stops charging the warning lights come on and everything shuts down
it could also be a loose belt but that’s less common
you need to do exactly what was said - check charging voltage while car is running and showing the error . It sounds like your alternator brushes are worn and once the alternator stops charging the warning lights come on and everything shuts down
it could also be a loose belt but that’s less common
Thread Starter
Junior Member
Joined: Nov 2021
Posts: 23
Likes: 4
2003 s55, 2002 clk55
No .
you need to do exactly what was said - check charging voltage while car is running and showing the error . It sounds like your alternator brushes are worn and once the alternator stops charging the warning lights come on and everything shuts down
it could also be a loose belt but that’s less common
you need to do exactly what was said - check charging voltage while car is running and showing the error . It sounds like your alternator brushes are worn and once the alternator stops charging the warning lights come on and everything shuts down
it could also be a loose belt but that’s less common
Thread Starter
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Joined: Nov 2021
Posts: 23
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2003 s55, 2002 clk55
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