Before any work in the engine compartment, carry out the following
steps in the order in which they are listed ⇒
:

Park the vehicle in a safe place on a firm, level surface.

Hold the brake pedal down until the engine is switched off.

Apply the electronic parking brake to help prevent the vehicle from moving Braking, stopping, and parking.

Shift the transmission into Park (P) (automatic) or Neutral (manual only) Shifting.

Stop the engine and remove the key from the ignition switch Starting and stopping the engine.

Let the engine cool down sufficiently.

Keep children and others away from the vehicle.

Make sure the vehicle cannot move unexpectedly.

Warning
Getting ready to work in the engine compartment
Opening and closing the engine compartmentVolkswagen Tiguan Service and Repair Manual > Pressures, Checking: Refrigerant Circuit Pressures (with A/C Service Station), Checking
Test Requirements
Note
Check cooling performance. The A/C system is functioning correctly when
the air flowing from the instrument panel vents has a temperature of 70C
or lower.
Setting on Climatronic "LO".
Setting on A/C system "AC" on; "max"; "cold".
Connections with valve and service con ...