Volkswagen Passat 1995 Official Factory Repair Manual page 2138

Engine components,checking
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.FU08.24.2
Intake system for leaks (false air),
checking
Checking with engine leak detection spray
Recommended special tools and equipment
Engine leak detection spray G 001 800 A1
Requirements
Parking brake must be engaged or else
daylight driving lights will be switched on.
For vehicles with automatic transmission,
selector lever must be in -P-.
Coolant temperature must be at least 80 C
Page ST-14 , Diagnostic mode 1: Check
measured values; PID 5, Coolant
temperature.
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12/6/2004