03 R230 SL500 Help! onboard computer going crazy! - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 03-18-2008, 06:07 PM Thread Starter
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Lightbulb 03 R230 SL500 Help! onboard computer going crazy!

Any advice would be appreciated. This being said here is my issue. I get SOS malfunctions, ABC, electric consumers offline, ABS light comes on. When one stops another starts. Could this just be a faulty ground wire or possibly some kind of corrosion causing this. The systems all seem fine and work properly but the warnings keep coming every few weeks.
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post #2 of 5 (permalink) Old 03-19-2008, 01:44 AM
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you first need to check your charging system (batteries first). the control units on your car cant handle low voltage.
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post #3 of 5 (permalink) Old 03-19-2008, 10:49 AM
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Yes charging and starting system is very important with this vehicle. You have two batteries to run different systems at different times. I would definatly start with having the batteries checked and the charging system checked. If those test good then start looking for other problems.
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post #4 of 5 (permalink) Old 03-19-2008, 05:06 PM
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if the car starts ok than its not the front battery, this battery is for starting only. More than likely it needs a new systems battery which is in the trunk. Is the light in blue or red when its on the cluster? blue = battery is low on charge. red = charging system
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post #5 of 5 (permalink) Old 01-04-2009, 11:54 AM Thread Starter
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Disconnecting SOS

Thanks for the help! It was the rear battery. Apparently the SOS has a problem that causes the system to continuously try to call for help and that killed the battery. Any advice on disconnecting the SOS?
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