Read and follow the introductory information and
safety information first⇒
Introduction
to the subject
The light bulbs for the backup lights are Lifetime bulbs with a very long service life. If the bulb is defective, you cannot change it yourself because other vehicle components must be removed. Defective backup light bulbs should be changed by an authorized Volkswagen dealer or authorized Volkswagen Service facility.
Volkswagen Tiguan Service and Repair Manual > A/C System, General Information: Refrigerant R134a
Refrigerant R134a Physical Data
Vehicle air conditioning systems make use of the vaporization and
condensation process. In this case, one works with a substance which boils
easily, designated as refrigerant.
The refrigerant employed is tetrafluoroethane R134a, which boils at -26.5 ºC
(-15.7 ºF) ...