Adjust Automatic Brake Adjuster - AR42.10-P-0169-01GG

Model 460, 461 

with drum brakes on the rear axle 

Model 463 

up to model year 2019 

with drum brakes on the rear axle 

Courtesy of MERCEDES-BENZ USA

The adjustment must always be carried out at both wheel brakes of the rear axle.

1. Turn stop plug (1) 90° and remove.
2. Remove stop plug (2).
3. Position relevant test piece of a feeler gauge through the inspection hole between the brake shoe (3) and the brake drum.

   The correct test piece must be selected based on the brake shoe air gap.

4. By turning adjustment screw (4), press brake shoe (3) outwards until clearance is achieved.

   Use suitable screwdriver.

5. Remove test piece of feeler gauge from inspection hole.
6. Repeat steps  3 to  5 at opposite brake shoe.
7. Apply hand and foot brake several times.
8. Check clearance again at both brake shoes (3) using appropriate feeler gauge and correct if necessary.

   The clearance must be observed.

9. Turn brake drum by hand.

   The brake drum must rotate freely without resistance. Minor grinding noises are safe.

10. Install stop plug (1) and turn 90°.
11. Install stop plug (2).