On the infotainment of the B9 platform (A4 B9, A5 F5, Q5 FY) the most common complaint is a black screen, a unit that restarts on its own, and a boot that stops partway. A significant part of these are software in origin, not a hardware fault: an update installed at a franchised dealer resolves it.
Show the restHide
The buttons of the control interface form a separate branch: a control panel damaged by water ingress or a spilled drink does not respond, and that is a parts replacement. On early cars small electrical faults are common too: intermittent dropouts of the central locking, the parking sensors and the phone connection.
What to check
- After switching the ignition on, wait for the full boot: a screen that stops or stays black is a clear sign
- Press every button on the central control panel and turn the rotary knob: all of them must respond
- Try the reversing camera, the audio system and phone pairing too