No brakes!

Asked by jraldrich2000 Dec 29, 2014 at 10:17 AM about the 1999 Mercedes-Benz M-Class ML 320 4MATIC

Question type: Maintenance & Repair

No brakes unless pedal all the way to floor, BAS/ESP light on, warning chime on, etc. HELP?

1 Answer
103,215

KenF answered 9 years ago

Brake pedal to the floor is caused by low brake fluid. Add fluid and pump the pedal. If it continues to go to the floor the fluid is leaking out somewhere. Do not drive it in this condition. After adding fluid you may need to bleed the brakes. The BAS/ESP light indicates a problem with the brake assist and electronic stability systems. Have the trouble codes read, it will give you more specific faults. Restoring the fluid levels should alleviate the warning lights, unless there is a faulty component - such as a bad master cylinder/power booster. BAS/ESP other known culprits in a Benz are the steering angle sensor as well as the stop light switch, especially if you've recently had a weak or dead battery issue. You can reset the steering angle sensor, and the stop light switch is a cheap part to replace. I'd start with getting the fluid level restored and the trouble codes scanned though.

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