First read and observe the introductory information
and safety warnings
Volkswagen recommends that you seek advice from a Volkswagen dealership before purchasing accessories, spare parts or service fluids. For example, if the vehicle is to be retrofitted with accessories or if parts have to be renewed. Volkswagen dealerships can recommend accessories, parts and service fluids suitable for your requirements. They can also answer any questions you might have regarding official regulations.
Volkswagen recommends that you only use approved Volkswagen accessories and Volkswagen Genuine Parts® . These parts and accessories have been specially tested by Volkswagen for suitability, reliability and safety. And Volkswagen dealerships are qualified to install them correctly.
Although the market is constantly scrutinised, Volkswagen cannot assume responsibility for the reliability, safety and suitability of products Volkswagen has not approved. Volkswagen can therefore assume no responsibility for these parts, even if they have been approved by an official testing agency or are covered by an official approval certificate.
Any retrofitted equipment which has a direct effect on the vehicle and/or the way it is driven must be approved by Volkswagen for use in your vehicle and bear the e mark (the European Union's authorization symbol). These devices include cruise control systems or an electronically controlled suspension.
Any additional electrical components fitted that do not serve
to control the vehicle itself must bear the
mark (manufacturer conformity
declaration in the European Union). Such devices include refrigerator boxes, laptops
and ventilator fans.

WARNING
Running-in
Service fluids and consumablesUnderseal
First read and observe the introductory information
and safety warningsThe underside of the vehicle is coated to protect it from
corrosion and damage. The protective coating on the underside of the vehicle could
be damaged when driving. Volkswagen therefore recommends that the protective coati ...
Checking with Expansion Valve and Receiver/Dryer, with Internally Regulated
A/C Compressor
Note
Connecting service station. Refer to
→ Chapter „Connecting Service Station“.
Observe test requirements. Refer to
→ Chapter „Pressures, Checking“.
–
...
Pressure and Boiling Point
The boiling point given in tables for a liquid is always
referenced to an atmospheric pressure of 1 bar (14.5 psi). If
the pressure acting on a fluid changes, its boiling point also
changes.
For example, water boils at a lower temperatur ...