Volkswagen PASSAT Repair Manual page 261

Rear brake caliper, servicing
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.4
Installing
- Place protective seal with the outer sealing lip on
the piston.
- Insert protective seal inner sealing lip into the
caliper housing groove using a screwdriver.
Note:
Hold piston in front of brake caliper housing.
Page 6 of 8
47-20
12/7/2004