8.0r Caliper C38/C43:
1 - caliper mounting bolt. Must be replaced after each dismantling
2 - support with parking brake drive lever. Should be replaced in case of leakage near the parking brake drive lever
3 - bleed nipple. Before screwing in the nipple, its thread should be lubricated with a thin layer of protective grease G052150A2
4 - nipple cap
5 - piston sealing ring
6 - piston with automatic regulator of the working clearance between the brake pads and the piston
7 - guide pin
8 - piston cuff
9 - guide pin cap
10 - brake shoe guide
(Read the original source on the website «audimanual.ru»)