Question about 2001 Mercedes-Benz C-Class

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Hey can somebody please help i have 2002 c240 and the battery/alternator light just came on. I already have a new battery and alternator. so what can be the problem now? please somebody help!

Battery alternator

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Clean the battery terminals well. Use a special di-electric between the clamps and the posts (nothing else as vaseline or other are insulators)
Make sure the belt is tight that turns the alternator. Make sure the alternator has a good ground (not greasy or oxidized). Make sure the engine block is grounded to the frame with a braided cable. Hopefully you replaced the voltage regulator when you changed the battery as is the custom of any trained mechanic.

Posted on Nov 26, 2013

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Posted on Jan 02, 2017

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SOURCE: i have a 02 mercedes c240, the battery dies every day, replaced battery and it keeps dying, i have to jump it off every time i drive it. please help

one of the problems could be , you have a bad drain on battery, check charging system,if you disconect battery and hook it back up does it ark if so check all elecrical components for drain

Posted on May 26, 2009

  • 172 Answers

SOURCE: 2001 c240 battery/alternator - visit workshop light

This is normally a low voltage from the alternator condition. Hook a voltmeter to the battery and note the reading. Should be 11.6vdc to 12.2vdc. Start the car, after a minute or so it should be around 13 to 14 vdc., if not then the alternator may be bad

Posted on Jan 09, 2010

  • 1 Answer

SOURCE: 2002 mercedes c240 ,changed battery still will not

I had the same problem. I don't know if your solution is the same as mine, but mine was a problem with the electronics in the seat adjustments. It was going to cost me about $1,000.00 to replace these. I had the seats unplugged.

Posted on Jan 28, 2010

  • 15 Answers

SOURCE: I jumped started somebody's car,

Maybe fried the solenoid jumping the other car. Or voltage regulator

Posted on Dec 20, 2010

alicantecoli
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SOURCE: clk 320 2002 battery light

check voltage across battery with engine running and engine off ,check with a automotive multimeter as it may just be a faulty dial ,if voltage rises to 14.7 volts or there abouts with engine at 2000 rpm then all is fine ,if low then it could be a problem with the ECU as this controls the output on a newer car like this and if its not working correctly then its a expensive dealer job but the alternator can be converted back to battery sensed charging

Posted on Mar 18, 2011

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2001 c240 battery/alternator - visit workshop light


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hey

is your battery leads loose?? iv a feeling the alternator you got might be slightly defective!! if its brand new give it another month other wise bring it back!!

Damien

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