Volkswagen Passat 1995 Official Factory Repair Manual page 3555

Rear brake caliper, servicing
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.4
- Thread piston into housing by turning knurled
wheel clockwise.
Note:
Install special tool 3272 so that the collar (arrow)
of the tool is seated against the brake carrier.
If piston is difficult to move, use a 13 mm open
end wrench on flats (arrow A) provided for this
purpose.
If the piston is pushed back with a piston resetting
tool or by operating the foot brake the automatic
adjustment in the brake caliper is destroyed.
- Install brake pads.
Page 7 of 8
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12/7/2004