Note: When repairing, it is essential to install the repair kit completely. Apply a thin layer of mounting paste "G 052 150 A2" to the brake cylinder, piston and seals.
Rear brake caliper, electric parking and hand brake (ERB) 1. Self-locking bolt. 35 Nm. Usually subject to replacement. When loosening or tightening, hold the guide bolt; 2. Brake caliper housing with actuator; 3. Bleed nipple.; 10 Nm; 4. Protective cap. Place on the bleed nipple; 5. Lip seal; 6. Clamping nut. For actuating the parking brake; 7. Piston; 8. Guide pins. Lubricate before installing the protective cap. Supplied as a spare part with sufficient grease; 9. Protective cap. Place on the brake bracket and guide pin; 10. Brake bracket with guide pins and protective cap. Supplied assembled, with plenty of grease on the guide bolts. If the protective caps or guide pins are damaged, install the repair kit. When installing the guides, use the supplied tube of grease; 11. Protective cap. Place the outer working edge on the piston
(This publication is borrowed from the resource AUDImanual)