My w120 s class 420 1994 Mercedes ABS and ASR light comes on when I back up or make sharp turns why?

Asked by Jun 05, 2015 at 09:07 PM about the 1994 Mercedes-Benz S-Class S 420

Question type: General

When the car starts up it runs fine. As soon as I make sharp turn of back the car up the
ASR and ABS warning light comes on but this happens when it 80% or hotter or its
extremely cold weather (0-).

1 Answer


Sounds like the wiring going to one of the front wheel ABS sensors is bad. These wires are prone to wear and breakage because they're always moving and flexing when you turn the steering wheel. This is being further exasperated with the heat. Heat causes things to expand and can make a questionable connection come loose. HTH. -Jim

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