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Pelican Technical Article:

Parking Brake Adjustment

Kerry Jonsson

Time:

30 minutes30 mins

Tab:

$10

Talent:

**

Tools:

flathead screwdriver

Applicable Models:

Mercedes-Benz W211 (2003-09)

Parts Required:

Wheel lug

Hot Tip:

Jack up the rear axle so you can feel the drag as you adjust it

Performance Gain:

Allows the car to be held still while parked on a hill

Your parking brake system is designed to hold your car still while it is parked. This is particularly important if your car is a stick shift. Mercedes Benz does not bring a manual transmission model 211 chassis to the United States. An automatic transmission has a parking pawl in the transmission that holds the drivetrain in place when the vehicle is in park. The parking brake system assists the parking pawl to hold the car still while there is stress placed on the parking pawl in the transmission from being parked on a hill. Parking brake shoes can wear out and every so often need to be adjusted to maintain their grip of the inner drum of the rear brake rotor. In this tech article we will go over all the steps to adjust your parking brake.

In order to adjust your parking brake you will need to lift and support the rear axle of your vehicle. See our tech article on jacking up and supporting your vehicle.

Working inside the vehicle on the driver side, release the parking brake by pulling on the parking brake release handle.
Figure 1

Working inside the vehicle on the driver side, release the parking brake by pulling on the parking brake release handle.

Mercedes-Benz suggests adjusting the parking brake with a wheel installed.
Figure 2

Mercedes-Benz suggests adjusting the parking brake with a wheel installed. However, I find the wheels to be too deep, not allowing a screwdriver to fit. You could use a long screwdriver if you have one, but sometimes the room needed to lever it just isn't there. Remove one lug fastener and rotate the wheel until the missing lug is just above the 3 o'clock position. Look inside and you should see the parking brake adjustment pawl.

Certain Mercedes Benz rims do not allow you to swing the flat head screwdriver back and forth to make the adjustment.
Figure 3

Certain Mercedes Benz rims do not allow you to swing the flat head screwdriver back and forth to make the adjustment. We recommend you remove the wheel to make the parking brake adjustment.

Lever the flathead screwdriver in the direction of the blue arrow to loosen the adjustment so you can remove the brake drum if necessary.
Figure 4

Lever the flathead screwdriver in the direction of the blue arrow to loosen the adjustment so you can remove the brake drum if necessary.

Lever the flathead screwdriver in the direction of the red arrow to tighten the parking brake adjustment.
Figure 5

Lever the flathead screwdriver in the direction of the red arrow to tighten the parking brake adjustment. Mercedes Benz service procedure has you lever in the direction of the red arrow until you can no longer spin the brake rotor. Then release the adjustment 10 notches. I recommend you apply the parking brake pedal 3 clicks and then adjust at the parking brake shoes until you feel the drag of the parking brake shoes and stop. When you release the parking brake you should not feel any drag from the parking brake shoes.

This is what is going on inside the inner brake rotor.
Figure 6

This is what is going on inside the inner brake rotor. Levering towards the back of the car tightens the adjustment.

Levering towards the front of the car loosens the adjustment so you can more easily remove the brake rotor.
Figure 7

Levering towards the front of the car loosens the adjustment so you can more easily remove the brake rotor. Simply install the brake rotor and adjust the parking brake shoes. Attach the wheel and you are done. Always double check that your parking brake can hold the vehicle when you have finished adjusting the parking brake.

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Comments and Suggestions:
Lewis Comments: Is this the same for a w212 e220CSI estate I could not find the adjuster
January 26, 2016
  Followup from the Pelican Staff: Applicable Models:

Mercedes-Benz W211 (2003-09)

We don't currently have that tech article. If we get a chance to perform the procedure, we will be sure to document it.

I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
Chat Comments: Having just done mine,the instruction to lever the screwdriver in the direction of the red arrow is misleading. You actually turn the adjuster screw in that direction not the handle of the screwdriver.
August 23, 2014
  Followup from the Pelican Staff: Correct, levering the screwdriver in the direction of the arrow moves the blade of the screwdriver into the adjust teeth to move it. - Nick at Pelican Parts  

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