Volkswagen Passat 1995 Official Factory Repair Manual page 4108

A/C refrigerant system, notes
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.HA01.87.1
Note:
For information on A/C wiring see applicable
wiring diagram.
See also A/C refrigerant system safety
precautions starting
Green label in engine compartment indicates
A/C system is charged with refrigerant R-134a.
Only a high pressure service valve is used for
A/C system servicing. A low pressure service
valve is not installed in the A/C system. Perform
all A/C system service operations (i.e.
discharging, evacuating, recharging) through
the high pressure service valve only.
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