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Mercedes-Benz brakes repair questions and answers

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  • AutoMD Member
    AutoMD Member - 1999 Mercedes Benz SL500 - Brakes - 8/16/2014
    My brake pedal soft after I had the brake fluid changed.
    I had the brake fluid replaced in this car, per Mercedes recommendations, and the brake pedal became soft. I thought there might be air in the line, but the garage says no. I have to push the brake pedal down a considerable distance before the brake engages, and ...
    • Jimm
      8/16/2014 Jimm
      Have the brake system bled of residual air - sounds like the brake system was not bled properly.
  • Mobalufon
    Mobalufon - 1989 Mercedes Benz 300E - Brakes - 8/11/2014
    Brake Line leaking!! How many brake lines does Benz 300 have? Left or Right? Front or Rear?
    I paid to fix the 'left' line leakage barely 6 months ago, now, I am told that the right brake line leaks compromised by the breakage of the rear spring-coil!??
    0 answer
  • AutoMD Member
    AutoMD Member - 2005 Mercedes Benz C240 - Brakes - 6/6/2014
    Why does my steering wheel shake at low speed when i apply the brakes lightly? none at high speed?
    i replaced new tires,new rotor and pads,new bearings front end.
    • AutoMD Member
      6/6/2014 AutoMD Member
      Possible air in brake line. Try Bleeding. Another possibility is the anti lock metering valve.
  • AutoMD Member
    AutoMD Member - 2005 Mercedes Benz C240 - Brakes - 6/6/2014
    Why does my steering wheel shake when i apply the brake at low speed and none at high speed?
    its on and of generally at 40mph when i lightly apply the brakes,i replaced new tires,brake pads and rotor,new tires,had 4wheel allignment?
  • AutoMD Member
    AutoMD Member - 1984 Mercedes Benz 380SL - Brakes - 5/15/2014
    I replaced master brake cylinder, calipers,rotors brake lines.bleed master cylinder and calipers and still no brakes
    what step if any im missing,how to check brake booster.
    • GT500Knights
      5/15/2014 GT500Knights
      First off check that the vacuum hose is connected to the brake booster. Second, ensure the check valve that connects the brake booster to the hose is oriented correctly. It's a one way valve. If you pull it out, the side that you try to blow through that doesn't allow air through is the side the vacuum hose connects to. Similarly, if you apply suction to that same side, it is the side that connects to the vacuum hose. The other side connects to the booster.

      If all of the above is well, your next step is to listen for any hissing sound, particularly inside the vehicle cabin. With the car running, step on the brake. If the pedal is stiff and you can hear a hissing-suction sound, then the brake booster diaphragm has a tear in it and needs to be replaced.

      Ensure that all air in the brake system has been bled out. Keep reservoir topped off during any bleeding process. The most basic bleeding process begins with the rear right, then rear left, then front right, then the front left brakes. It may vary on your vehicle, so make sure you look that up.

      Ensure the seal that connects the reservoir to the master cylinder is intact and not leaking. Likewise, ensure the seal for the reservoir cap is also intact. Check all brake lines, caliper and wheel cylinder bleed screws, as well as caliper and wheel cylinder pistons for any dripping fluid. For wheel cylinders, it is normal to have a small amount of brake fluid on the end near the pistons--it is ok for it to be slightly damp with brake fluid, but any dripping is not ok.

      If utilizing drum brakes, ensure the adjustment is correct. If the adjustment is too low, the shoes will not contact the drum, and your brake pedal will drop to the floor.
  • AutoMD Member
    AutoMD Member - 1984 Mercedes Benz 500SEL - Brakes - 4/21/2014
    How much is a tune up kit?
    I need a tune up.
    • HouseCallAuto
      4/21/2014 HouseCallAuto
      Impossible to quote until a mechanic looks and sees what is needed. They do not sell "tune up kits" anymore. Mercedes Benz is not like other ballpark estimates on other cars.
  • AutoMD Member
    AutoMD Member - 2007 Mercedes Benz C230 - Brakes - 4/5/2014
    My abs light turned on when my mechanic did an oil change/service a. Do i need to worry about it.
    He didnt have the key to reset it in the computer?
    • HouseCallAuto
      4/5/2014 HouseCallAuto
      Doing an oil change will not cause an abs fault nor can I even remotely relate it to an oil change. Only *reaching* thing I can think of is if the lift made contact with an abs wheel speed sensor wire that was already dangling and got crushed (seems doubtful) or if just the car being lifted off the ground with the suspension being allowed to fully extend has been known to cause an issue rarely. I have nothing more... There is no worry though. With the abs light on you do not have functioning abs which is certainly not a danger seeing as how cars had no abs through around 1980 about.
  • AutoMD Member
    AutoMD Member - 2010 Mercedes Benz C300 - Brakes - 3/14/2014
    Brakes fail after carwash
    I have a mercedes c300 4matic 2010 Every time i go to the carwash my brakes totally fail. I have to push the brake many times until it becomes back to normal. this happend in cold weather what could this be? how can i fix this? Please help
    0 answer
  • AutoMD Member
    AutoMD Member - 2010 Mercedes Benz C300 - Brakes - 3/14/2014
    My brakes fail after car wash when its cold outside
    I have a mercedes benz c-300 4matic 2010 Everytime i go to the carwash my brakes totally fail i have to push the brake about 9 times until it becomes back to normal. this happens when its cold outside. What could this be? How can i fix it? Please help
    0 answer
  • Eddie
    Eddie - 2009 Mercedes Benz C300 - Brakes - 2/10/2014
    Short intermittent grinding noise from the front tire. Braking, nor turns makes difference. Only above 10-20 mph
    Hi, my 2009 C300 at around 52K (no longer under warranty) has a short intermittent grinding noise coming from the front right tire. It only starts at about 10-20mph and its not constant. It's as if every time the tire turns, it is grinding against one specific spot ...
    • Jimm
      2/10/2014 Jimm
      Check the following; loose front brake caliper mounting (loose / missing mounting bolts or hardware) - to allow the brake caliper to move or flex during certain turning or braking conditions. Also, look for a lose / worn front wheel bearing. To thoroughly check the front brake caliper - you will need to raise and support the front end, make sure the front wheels are clear of the ground, and then remove the front wheels.

      The parts are readily available from these many on-line sources,,,,, - to list only a few possibilities.
      In fact, they (RockAuto) list the front brake caliper guide pin / bolt kit from around $5.00 (axle set left and right sides) for your vehicle.
  • AutoMD Member
    AutoMD Member - 2003 Mercedes Benz G500 - Brakes - 12/26/2013
    Where do i find the axle codes
    preparing to do front and rear brakes
    • Jimm
      12/26/2013 Jimm
      FS W463 G500 Axle ID locations; please see the rear axle ID tag with #'s on the long control arm. The front
      axle housing has the ID tag located.
      The brake parts are readily available; try these on-line sources;,,,, - to list only a few possibilities.
      In fact, they (RockAuto) list the rear brake pads from around $9.00, and the front pads from around $15.00 (per axle set) for your vehicle.

  • AutoMD Member
    AutoMD Member - 2005 Mercedes Benz S500 - Brakes - 11/25/2013
    I was wondering when i change my front brakes and rotors and sencors is there anything else i need to do cause my ABS
    lights comes on ?
    • HouseCallAuto
      11/25/2013 HouseCallAuto
      If the abs light was NOT illuminated before you did the brakes then there is likely a damaged wheel speed sensor. This means that you will need to replace the damaged sensor but you have to know which one and if you cannot visually see a damaged wire for example you will need to read fault codes that can identify which wheel speed sensor threw the code. That means an abs capable scan tool for MB cars.
  • rcampbell42
    rcampbell42 - 1991 Mercedes Benz 500SL - Brakes - 9/23/2013
    ASR warning light on stays on.
    ASR warning light on dash. I pressure washed the rims and brake calipers wth a wand and noticed something was unplugged or during washing unplugged them on all four wheels. I think it was then that the ASR light on the dash was on after I plugged them in.
    0 answer
  • institut1
    institut1 - 1988 Mercedes Benz 560SL - Brakes - 9/1/2013
    Install master brake cylinder
    How long should it take to install it, and what should a reasonable cost be? Location SoCal. Should the brake warning light come on?
    • John's Auto Repair
      basically the labor should be about an hour. The brake warning light shouldn't come on once
      the system is bleed.
    • Jimm
      9/1/2013 Jimm
      Labor would be around one hour. The master cylinder parts cost should be no more than around $70.00 for the rebuilt / remanufactured unit. Check the many on-line auto parts sources, such as;,, and - to list only a few sources. For example, they (PartsGeek) list the brake master cylinder (without reservoir) from around $61.30 for your vehicle.
      9/1/2013 institut1
  • pinoycaloy
    pinoycaloy - 2003 Mercedes Benz SLK320 - Brakes - 8/1/2013
    Bas esp light on while driving
    warning light blinks, locks front right tire and then bas esp light on. replaced brake light switch, wheel speed sensors and wheel bearings on both front tires
    0 answer