Volkswagen PASSAT Repair Manual page 250

Girling front brake caliper, servicing
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.2
- Press piston into the brake caliper housing using
piston resetting tool.
Note:
The protective seal outer sealing lip will then locate in
the piston groove.
Page 5 of 5
47-9
12/7/2004