ADDITIONAL INFORMATION FOR VEHICLES WITH A/C COMPRESSOR WITHOUT A/C CLUTCH, (ONLY WITH A/C Compressor Regulator Valve -N280-)

WARNING: This page is about a different car, the 2022 Audi S3, 2022 Audi RS 3, 2022 Audi A3 Quattro, and 2022 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

The engine can be started only after the refrigerant circuit has been completely assembled (the A/C compressor runs continuously).
If the engine has to be run when the refrigerant circuit is empty, only do so for as long as absolutely necessary and avoid high engine speeds.