A8L Quattro Sedan V8-4.2L (AKB) (2002)
Fig. 4 Inserting inner sealing lip of protective cap using 3409 wedge
Note: Hold piston in front of caliper housing for this procedure.
Fig. 5 Screwing piston into brake caliper housing up to stop
Press powerfully on piston while screwing.
Note: Outer sealing lip of protective cap will then engage in piston groove.