34 11 000 Removing and installing/replacing brake linings on both front disk brakes

Special tools required:

NOTE: After completing work:

Fully depress brake pedal several times so that brake linings contact brake disks.
When installing new brake linings at front and rear axles, brake fluid level must be brought up to "MAX" marking.
Hold ignition key for at least 30 seconds in position "1" without starting engine.
This clears a fault entry in the RAM

This prevents the brake wear indicator lamp from lighting up again.

Necessary preliminary tasks:

Lift out retaining spring (1).

Left:

Disconnect plug connection for brake lining wear sensor.

If necessary, replace brake lining wear sensor.

Fig 1: Lifting Out Retaining Spring

Remove plastic plugs (2).

Lift brake hose out of bracket.

Fig 2: Removing Plastic Plugs

Release guide screws (1) with special tool 34 1 080. Withdraw brake caliper backwards.

Installation:

Check threads.

Replace all guide screws which are not in perfect condition.

Tightening torque 34 11 3AZ.

Fig 3: Releasing Guide Screws

Turn piston fully back with special tool 34 1 050.

IMPORTANT: When forcing piston back:

Pay attention to brake fluid level in expansion tank; brake fluid that spills over will damage paintwork.

Fig 4: Turning Piston Fully Back

Remove outer brake lining.

Inner brake lining is located with its spring in the piston.

IMPORTANT: Mark any worn brake linings.

In the event of one-sided brake lining wear, do not change brake linings round.

New brake linings may only be installed if the brake disk thickness is greater than or equal to the minimum brake disk thickness (MIN TH).

Observe minimum thickness of brake pads.

Clean brake linings.

Do not apply grease to brake pad backplate.

Fig 5: Removing Outer Brake Lining

Check dust sleeve (1) for damage and replace if necessary.

Clean mounting face (2) of brake piston and apply a thin coating of anti-squeak compound.

IMPORTANT: Dust sleeve must not come into contact with anti-squeak compound as this may cause the dust sleeve to swell.

Fig 6: Identifying Dust Sleeve & Mounting Face Of Brake Piston

Clean mounting faces (1) and (2) of brake lining hammer heads/brake caliper housing and coat with anti-squeak compound.

NOTE: Grease contact surfaces on brake caliper at top and bottom.

Fig 7: Identifying Mounting Faces Of Brake Lining

Clean mounting face (3) of brake caliper and apply a thin coating of anti-squeak compound.

Fig 8: Identifying Mounting Face Of Brake Caliper

Clean brake caliper holder at hammerhead guides and apply a thin coating of anti-squeak compound.

Fig 9: Identifying Brake Caliper Holder