Question about 1995 Mercedes-Benz S-Class

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Changing front brake pads, brake fluid starting leaking after removing bolts

How to change front brake pads on 1995 Mercedes S320. When I turn the bolts out, brake fluid started leaking. After reading on the internet, do I just take out the pins to change the pads?

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  • anthonyshiel May 10, 2009

    I am a novice mechanic! This is great advice...I searched all over and only this forum helped. It's appreciated!

  • anthonyshiel May 10, 2009

    Your advise is extremely accurate! Unfornately I received it after trial and error. Everything you indicated is what I did. Qudos! Thanks for your advise. Please advise on how to bleed the brakes. The brakes are not firm. I read on the internet that I must locate a bleed nipple. Where and what the heck this that? Please advise.

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There should be no brake fluid comming from the caliaber at all.look on the in side of the caliaber on the top and bottom you should see 2 long bolts. they may be hexagon,allen key, or a bolt. there are the 2 you are looking for. DO NOT SET PARKING BRAKE. when you take the bolts out you will see 2 small shafts where the bolts came out of. they must be push back in flat with the caliaber ( you may or may not have them). you have to open the lid where you add brake fluid. now take off the front pad leave the pad on in the hole. take your C-CLAMP and place it over the caliaber and the brake pab and compress the piston until it flat with the caliaber. ( you will repeat this on the other side ) at this point take your dic brakequit spred a coating on the parts thats need. ( referr to the old parts ) dont get anything on the front of the pad. let the pad sit for about 5min. ( smoke a cigarette. if you dont smoke i will teach that in part 2 ) now that the dic brake is tacky place the one that fixs in the hole on first now the outter one. slide it back on you may have to tap it in place after its seated replace the bolts. now your going to see that it has a gap between the brake pad and the rotor.replace the lid on where you add brake fuild. put the tier back on the car and pump your brakes. it should get hard. ( not you the brake pedal ) now repeat these steps for the other side.

you may have two bleed your brakes because you let fuild out that means you let air in. PLEASE let me know if this helped you.

Posted on May 10, 2009

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If they are fixed calipers (which they probably are) then yes. If they are floating calipers then you have to remove the two bolts on the guide pins. From your description it sounds like they are fixed calipers, in which case you remove the clip on the pin and remove the pin and pads. Compress the pistons and replace the pads and pin. Be sure to tighten the bolt you removed.

Posted on May 10, 2009

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Sounds like from what you describe it's a leaking break caliper. The best thing to do is get a rebuilt one. It's best to replace them in pairs. Also replace or clean the brake pads thoroughly!

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How to change brake pad and check rotors


Brake Pads Removal & Installation Front for_car_toy_cam_02-04_sst_frt_dsc_asm.gif

To Remove:
  1. Drain brake fluid to ½ full level in reservoir.
  2. Remove the front wheels. toy_car_cam_frontbrakepads.gif

  3. Remove the front brake caliper assembly.
  4. Remove the 2 anti-squeal shims from each of the 2 brake pads.
  5. Remove the wear indicator from each of the 2 brake pads.
To Install:
NOTE: When replacing worn pads, the anti-squeal shims must be replaced together with the pads.
toy_car_cam_frontbrakepads.gif

  1. Using a large C clamp or equivalent press piston into the caliper.
  2. Apply disc brake grease to the inside of each anti-squeal shim.
  3. Install the anti-squeal shims on each pad.
  4. Install the pad wear indicator clip to the pads.
  5. Install the pads with the pad wear indicator plate facing upward.
  6. Install the brake caliper with the 2 mounting bolts. Torque the bolts 25 ft-lb (34 Nm).
  7. Install the front wheels.
  8. Fill the master cylinder with new clean brake fluid.
  9. Pump the brake pedal several times to seat the brake pads.
Rear TMC made rear brake components toy_car_cam_tmcrearbrakes.gif

TMMK made rear brake components toy_car_cam_tmmkrearbrakes.gif

To Remove:
  1. Drain the brake fluid to ½ full level in reservoir.
  2. Remove the rear wheels.
  3. Remove the caliper slide pins.
  4. Remove the caliper slide pin bushings (TMMK made) (Kentucky).
  5. Remove the rear brake calipers.
  6. Remove the 2 brake pads with the anti-squeal shims.
  7. Remove the anti-squeal shims and pad wear indicators from brake pads.
To Install:
  1. Using a large C clamp or equivalent press the piston into the caliper.
  2. Coat both sides of the outer anti-squeal shim with pad grease.
  3. Install anti-squeal shims to each pad.
  4. Install wear indicators on the 2 brake pads.
  5. Install the caliper slide pin bushings (TMMK made) (Kentucky).
  6. Install the rear brake caliper with the slide pins. Torque the slide pins as follows:
    • TMC made (Japan): Torque the caliper slide pin 25 ft-lb (34.3 Nm)
    • TMMK made (Kentucky): Torque the caliper slide pin 34 ft-lb (47 Nm)
  7. Fill the master cylinder with new clean brake fluid.
  8. Pump the brake pedal several times to seat the brake pads.
  9. Install the rear wheels.
prev.gif next.gif Brake Rotor Removal & Installation Front To Remove:
  1. Remove the front wheels.
  2. Remove the front brake caliper assembly.
  3. Remove the front brake pads.
  4. Remove the 2 bolts and caliper mounting bracket.
  5. Place match marks on the disc and axle hub.
  6. Remove the front wheel disc.
To Install:
  1. Align the match marks and install the front disc.
  2. Install the brake caliper mounting bracket. Torque the bolts 79 ft-lb (107 Nm).
  3. Install the brake caliper. Torque the bolts 25 ft-lb (34 Nm).
  4. Install new gaskets and connect the brake hose to the caliper with the banjo fitting bolt. Torque the fitting bolt 22 ft-lb (29.4 Nm).
  5. Fill the reservoir with brake fluid.
  6. Bleed the brake system.
  7. Install the front wheel.
Rear To Remove:
  1. Remove the rear wheels.
  2. Remove the brake caliper assembly.
  3. Remove the brake pads.
  4. Remove the 2 bolts and the caliper mounting bracket.
  5. Place match marks on the disc and axle hub.
  6. Remove the rear disc.
To Install:
  1. Align the match marks and install the rear disc.
  2. Install the rear brake caliper mounting bracket. Torque the bracket bolts as follows:
    • TMC made (Japan): Torque the bracket bolt 46 ft-lb (61.8 Nm)
    • TMMK made (Kentucky): Torque the bracket bolt 34 ft-lb (47 Nm)
  3. Install the rear brake caliper with the slide pins. Torque the slide pins as follows:
    • TMC made (Japan): Torque the caliper slide pin 25 ft-lb (34.3 Nm)
    • TMMK made (Kentucky): Torque the caliper slide pin 32 ft-lb (43 Nm)
  4. Install new gaskets and connect the brake hose to the caliper with the banjo fitting bolt. Torque the fitting bolt 22 ft-lb (29.4 Nm).
  5. Fill the reservoir with brake fluid.
  6. Bleed the brake system.
  7. Install the rear wheel
prev.gif next.gif

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1 Answer

How do you change front brake pads on an Audi A6 2006


How to change front brake pads & rotors (brake disc) on 2006 Audi A6:

Atention!!!
Don't disconnect any brake line from caliper!
Don't disconnect any ABS sensor!
For change front brake pads you must raise vehicle, remove wheels, extract the retaining spring of the caliper, and remove the caliper as follow:

1. Do not disconnect the brake hose from the caliper, and do not allow the caliper to hang by the brake hose!
2. Remove top and bottom caps (on back side of the caliper) for access to guide pins, then unbolt and remove them from the brake carrier. Remove the caliper.
3. Now you must thoroughly clean the brake calipers (free of grease).
4. Remove outer brake pad from brake carrier.
5. Pull inner brake pad out of brake caliper piston.
6. Remove brake carrier from wheel bearing housing (two ribbed bolts). 125 Nm
7. Remove brake disc from wheel hub.
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9. Check up the brake fluid level on the reservor, and emptying if neccessary!
10. Push piston back into brake caliper housing.
11. Install inner brake pad (with expanding spring) in brake caliper piston. (Arrow marked on pad - if exist, must point in direction of brake disc rotation when vehicle is moving forward).
12. Install outer brake pad into brake carrier.
13. Bolt brake caliper housing to brake carrier using two guide pins. Tightening torque is 25 Nm.
14. Install both caps.
15. Insert retaining spring into brake caliper housing. Important: Depress the brake pedal firmly several times while the car is stationary so that the brake pads adjust to their normal operating positions!!! Check brake fluid level and top up if neccessary!!!

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2 Answers

Changed brake pads! Success.. Now I need to bleed the brakes.


To bleed you brake system, you will need brake fluid, a jar, and a couple feet of small hose that fits tightly on the bleeder screws. You should not need to remove the tires to access the bleeder screws, but you may need to raise the vehicle a bit to access them.

To bleed the system, start with the right rear wheel. Put a couple inches of brake fluid in the jar, attach the hose to the bleeder screw, put the hose in the jar of brake fluid, then open the bleeder screw. Once the bleeder screw is open, pump the brake several times. Next, close the bleeder screw. After you close the bleeder screw, remove the hose and jar, then fill the master cylinder with brake fluid.
Repeat the steps going to the left rear second, right front third, and left front last.

Once you have bled the system your brakes should be tight and working nice.

I hope this information helps you, and I wish you luck on your repair.

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Hi,
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To check which sensor it is, it's easier to unplug the sensor, and check with a continuity checker. If there is no continuity, you need to replace it.

Thanks for using Fixya! If this solves the problem, please rate as such. Thank you.

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