Rear Brakes Overview, S4 And S6
Rear wheel brake with automatic adjustment
- Parking brake, adjusting PARKING BRAKE, ADJUSTING
WARNING:
Install complete repair kit when rebuilding a caliper. The brakes can be checked on any standard commercial dynamometer providing drive roller speed does not exceed 5.5 km/h (3 mph). Before checking the brakes on the dynamometer, make sure the differential lock is switched off.
- Self-locking bolt
- 35 Nm (26 ft lb)
- Always replace
- When loosening and tightening, hold guide bolt
- Brake pads
- Replace in pairs REAR BRAKE PADS, S4 AND S6
- Thickness (new): 12 mm (0.47 in.)
- Wear limit: 2 mm (0.08 in.)
- When pad thickness including backing plate is down to 7 mm (0.28 in.), brake pads have reached their wear limit and should be replaced
- Brake carrier with guide bolts and protective caps
- Supplied as replacement part assembled with sufficient grease on the guide bolts
- If the protective caps are damaged, install repair kit
Part No. 443 698 470
- Use enclosed grease pad to lubricate guide bolts
- Mounting bolt
- 65 Nm (48 ft lb)
- Brake disc
- Replace in pairs
- Remove brake caliper first
- Diameter: 269 mm (10.59 in.)
- Thickness: 20 mm (0.79 in.)
- Wear limit: 18 mm (0.71 in.)
- Brake caliper housing
- Remove from brake carrier to replace brake pads
- Do not disconnect brake hose when replacing brake pads
- Piston diameter: 43 mm (1.69 in.)
- Brake caliper, repairing FRONT DOUBLE-PISTON BRAKE CALIPER OVERVIEW, S4 AND S6