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Old 09-04-2010, 03:40 PM   #1 (permalink)
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Date registered: May 2009
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ABS, ESP, BAS Warning Lights with Faulty Brake Light Indicator...

Hey Folks,
I have an 02 E430. Recently I came across the issue with ABS, ESP, BAS Warning Lights with Faulty Brake Light Indicator coming up on my dash. The problem was intermittent, then became a hard fault. I started by changing the brake switch, however that was not the cause of the faults. The car would fire the code as soon as I pressed the brake pedal. I would get the faults and my brake lights would stop working. I've seen MANY threads on the internet with individuals with similar cars complaining about this issue. I was able to narrow down the issue to the actual 'headlight switch'. I swapped the headlight switch for a new one, it was roughly $250 CDN. The lights all disappeared and my brake lights began working again. The car went to about 6 different mechanics before it was diagnosed. MB wanted to change my ABS module, however I was certain that was not the issue. Nonetheless, if you encounter this particular issue, your 'headlight switch' can be a likely culprit.
Ricky P.
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Old 09-04-2010, 04:12 PM   #2 (permalink)
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Vehicle: 2000 S210 E320CDI Avantgarde
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Do you mean the round switch used to turn the lights on and off etc?
For the avoidance of doubt, when answering posts I am referring to the W210 Mercedes...not the Renault12ts.
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Old 09-04-2010, 04:24 PM   #3 (permalink)
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Vehicle: '72 350SL, '85 300D, '98 E320, '14 GLK250
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I regularly had those brake related lights come on, but after installing new battery I have not seen them. I imagine there could be various causes, especially ones that reduce voltages like bad contacts or grounds.
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