S4 Sedan L5-2226cc 2.22L DOHC Turbo (AAN) (1992)
If more than one malfunction exists, the A/C Control Head display will automatically alternate between the different Diagnostic Trouble Codes
(DTC's).
After repairing malfunctions, erase DTC's from A/C control head memory using VAG 1551 Scan Tool (ST).