2008 ML350 - Low Brake Pedal Issue

25

Asked by mamin123 Mar 30, 2016 at 09:41 PM about the 2008 Mercedes-Benz M-Class ML 350 4MATIC

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 ?

7 Answers

50

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.

2 people found this helpful.
50

I have a similar concern. I've replaced the sensor, booster and master cylinder and the car still feels like it doesn't want to stop. The front brakes are at 7 mil. Even though I press the pedal to the floor, it takes too long to come to a stop. Issue has been growing over the last 4 or so years. I have a 2003, ML 350 that is otherwise in perfect condition.

1 people found this helpful.
25

Check your rear brake and rotor. I never thought that was the issue until I replaced rear rotors.it fixed the problem.

50

Hello mamin123. Thank you for sharing. I had the rotors and front and back brakes replaced in 2015. Since then, I have only put 15K miles on the car. I will look into it.

25

When you brake if you feel vibration on right side of Driver Seat then it is Rear Brake or Rotors. Most likely it is rotors. If you feel left side of Driver seat, it is front brake/rotors. This diagnosis was by MB Dealer and it did fix my problem. Note: There is some extra play in ML350 brake is normal compare to other cars not sure why but it is.

2 people found this helpful.
50

Thank you. I haven't had any vibration when braking, just too much "play" as you called it. My mother has a 2015 ML 350 and it drives and brakes beautifully. I wonder if the problem was specific to the 2003 model.

25

You may not have noticeable vibration like me but if you deliberately check, while you brake you may see shaking on your left or right side of your driver seat. If it is left side, it is front brake or rotor and if it is on right side of shaking, it is rear side of brake/rotor. It may not be case for you but it is something you will have to deliberately look for. I had to take it to MB Dealer to find out.

Your Answer:

M-Class

Looking for a Used M-Class in your area?

CarGurus has 138 nationwide M-Class listings starting at $3,995.

Postal Code:

CarGurus Experts

  • #1
    jihadghazali
    Reputation
    1,420
  • #2
    wellness
    Reputation
    1,200
  • #3
    snowseal19
    Reputation
    1,120
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Mercedes-Benz E-Class
30 Great Deals out of 496 listings starting at $5,700
Used Mercedes-Benz GL-Class
4 Great Deals out of 64 listings starting at $7,995
Used Mercedes-Benz S-Class
15 Great Deals out of 227 listings starting at $8,977
Used Mercedes-Benz C-Class
98 Great Deals out of 1,455 listings starting at $3,799
Used BMW X5
47 Great Deals out of 1,134 listings starting at $3,995
Used Mercedes-Benz G-Class
10 Great Deals out of 166 listings starting at $34,800
Used Lexus RX
39 Great Deals out of 845 listings starting at $3,995
Used Porsche Cayenne
15 Great Deals out of 316 listings starting at $6,995
Used Mercedes-Benz CLS
7 Great Deals out of 86 listings starting at $8,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.