PeachParts Mercedes-Benz Forum - View Single Post

spinedoc · #7 03-21-2003, 06:49 PM

With regards to the switch, it has not done it in 2 days, very very weird stuff. At least I can hold off on it.

With regards to the ABS/ASR lights I have done an exhaustive search on the forum and so far it looks like the likely culprits could be:

brake lamp switch
battery
alternator
overvoltage protection regulator
wheel sensors
faulty wiring harness

When it was at the shop they checked the alternator and said it was ok. I did replace the battery with a brand new official MB one, and replaced the brake lamp switch. The shop had tried to replace the overprotection relay but like I said, the part MB gave them was a different number and had 2 fuses instead of one, so my mechanic put the old one back in. When I spoke with him today he still seemed to think the overprotection relay was somehow at fault, but the lights go on with the old one and the new one, hmm. He still thinks it may be the wiring going to the OVP.

While he had it in the shop he did replace the ASR wiring harness, but not the main ECU harness. He also did the rear brakes and says the wheel sensors are OK.

After installing the battery and the brake lamp switch the lights dont seem to go on, but I have only turned it on 2 or 3 times since then and the lights are usually intermittent. When they do go on they go on for the next 10 or 20 car starts, then go away for the next couple of hours, weird, almost like a pattern.

OK techs/guys, can anyone further pinpoint what it may be? I would replace the overprotection relay but am hesitant (and so is my mechanic) since the part has 2 fuses and a different number. MB says the original one was discontinued and to use that new part, any thoughts on this?

Thanks much.