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 > Front Heater and A/C Unit: Auxiliary Heater Heating Element -Z35-, Checking
Checking the Auxiliary Heater Heating Element -Z35- with Peripheral
Components:
The Auxiliary Heater Heating Element -Z35- with peripheral components (load
signal for generator terminal DF, Low Heat Output Relay -J359-, High Heat Output
Relay -J360-, Intake Manifold Temperature Sensor -G72-, Engi ...