GLC & 626
- Raise and support rear of vehicle. Release parking brake. Uncrimp the lock nut and remove it. Remove the brake drum.
- On the GLC, place a flat-tipped screwdriver between the knurled pin and the quadrant; on the 626, between the adjusting plate and the quadrant of the adjuster. Twist the screwdriver to disengage the teeth. Push the quadrant adjusting lever toward the backing plate.
- Replace the drum. Install new lock nut and secure by crimping. A few operations of the brake pedal will reset the adjuster. Adjust the parking brake.