Audi A4: Laws and Regulations
Audi A4 (B9) 2016-2026 Service Manual / Heating, Ventilation & Air Conditioning / Laws and Regulations
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General Information
Note
The laws and regulations listed below are applicable in
Germany. Different or additional laws and regulations may apply
in other countries.
The effects of climate change can be seen wor
Laws and Regulations
Refrigerant Circuit, Converting R12 to R134a and Servicing
Note
For environmental reasons and on account of the
corresponding legislation, refrigerant R12 can no longer be
manufactured or
SEE MORE:
Right and Left Multifunction Buttons on Steering Wheel -E441-/-E440-,
Removing and Installing
Right and Left Multifunction Buttons on Steering Wheel -E441-/-E440-,
Removing and Installing, Steering Wheel with Round Airbag
Special tools and workshop equipment required
Trim Removal Wedge -3409-
The multifunction buttons -2-
are clipped to the decorative trim -1-.
The decorative trim -1-
A/C Technology Basic Principles
Physical Principles
The four known states of water also apply to air
conditioning system refrigerants.
1 - Gaseous (invisible)
2 - Vapor
3 - Liquid
4 - Solid
When water is heated in a container (heat absorption), water
vapor can be seen to rise. If the vapo
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