My R172 brakes failed on me - Mercedes Benz SLK Forum

Tires, Wheels, Brakes & Suspension Discussion and information regarding tires, wheels, brakes and suspension.

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#1 Old 08-10-2018
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Unhappy My R172 brakes failed on me

Hi, I recently got into an accident because of brake failure and am looking for some advice from the SLK experts.

I was standing at a red light (for approximately 1 min) with my foot on the brake waiting for the light to turn green. Suddenly, the car started to drive forward. I pushed all the way down on the brake but my car still rear ended the vehicle in front of me.

I will be taking the car to a mechanic for an initial diagnostic, but I need some tips on what could have possibly caused for the brakes to release and lock up.

Some initial diagnosis:
I’ve checked the brake fluid (new). Brake pads and rotors are in good condition. I did not get any error codes from the car code reader. I did not get any warning lights on the dashboard. There are no issues with braking at the moment.

Could a faulty ABS module be the source of the brake failure?

Any advice is greatly appreciated!!! I'm confused why this unfortunate incident happened.

2012 SLK 350 43k miles

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#2 Old 08-10-2018
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Did you brake with your left or right foot?
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#3 Old 08-10-2018
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Right foot, my other car is a manual so left foot is for clutch only.
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#4 Old 08-10-2018
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Olya, never heard of that on our cars. Usual reason that are published on other makes is mistaking the gas for the brake

OR MAYBE do you have the auto hold when you press the brake REAL hard to set the brake?

If you do, just moving the steering wheel a fraction or touching the gas will release the brake and well, you know what happens
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#5 Old 08-10-2018
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A faulty ABS module to be the surce? Unheard of, AFAIK, Normaly, these flaws are - auhmm - driver faults. Sorry to say.
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