2008 ML350 - Low Brake Pedal Issue

5

Asked by Mar 30, 2016 at 09:41 PM about the 2008 Mercedes-Benz M-Class ML 350

Question type: Maintenance & Repair

I have low Brake Pedal issue in my 2008 ML350 4Matic. I have checked
below already
1) Brake Fluid is new and at High Level
2) Brakes are Bleeded couple of times already
3) New Brakes and Rotors.

When I brake, I have to push all the way down. What could be the issue
and How do I go about diagnosing issue ?

1 Answer

40

If you have to pump the brakes to get it to stop, do this check. With the engine running, but the car in Park, press the brake pedal down as you would normally and continue to hold pressure against it. if you feel it slowly sinking towards the floor there a high probability the master cylinder is going bad. If that is not what happens, suspect the brake booster is at fault.

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