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ML430, 2000, warning lights

I have had a recurring problem with the ABS/BAS/ESP warning lights coming on and staying on. I have replaced the brake light switch 3 times. No help. I don’t want to spend any more money on this car and would like to keep it for another year or two. Question: Is it safe, or will it create damage to simply drive it with the lights on? My dealer is talking about trying a $2500 hydrolic repair. I’m not interested.

This has nothing to do with the brake light switch, so it isn’t surprising that replacing it didn’t help.

The ABS and stability control systems rely on some of the same circuitry from the wheels to the controller module(s). Therefore, the most likely problem is a bad ABS sensor. However, a scan of the ABS module is required for proper diagnosis.

The dealer wants to try a $2500 repair?? On what is this based?

I agree with NYBo, do as he says, but I will add one thing. Why are you taking this to a dealer? Dealers are no better (or worse) than independent mechanics for almost anything you might need done on your car. They will almost always charge more per hour and often more for parts and supplies. They also tend to look at repairs a little different than the independent.

A dealer may well recommend work that strictly may not be needed, but could be connected to the problem or maybe replace a part when a little repair would fix it ALMOST as good a new.  

There is no need to bring your car to the dealer for any service other than service that is going to be paid for by a recall or original warrantee.  During the warranty period be sure to have all required (as listed in the owner's manual) maintenance done and to document all maintenance work.

I suggest that most people would be better off finding a good independent (Not working for a chain) mechanic. 

Note: Never ever use a quick oil change place. They are fast cheap and very very bad.