Bleed Cooling System.
WARNING: This page is about a different car, the 2023 Audi S3, 2023 Audi RS 3, 2023 Audi A3 Quattro, and 2023 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
Procedure
-- Set the temperature to "HI".
-- Press the AC button to turn off the A/C compressor.
- The LED in the button must not come on.
-- Start the engine and run it at approximately 1500 RPM for a maximum of two minutes.
-- With engine running, fill coolant up to overflow hole on coolant expansion tank.
-- Close the coolant expansion tank cap -arrow- until it locks into place.
-- Let the engine run at idle until both large coolant hoses on the radiator are warm.
-- Turn off the engine, check the coolant level and fill with coolant. Refer to COOLANT LEVEL, CHECKING AND FILLING .