Bulb monitorBulb monitor  - Auto-check control - Driver information system - Controls - Audi S5 Owner's Manual - Audi S5

The bulb monitor checks whether the lights on the vehicle are working.

The bulb monitor checks whether the lights on the vehicle are working. If it detects a defective bulb on the vehicle it will show a yellow warning symbol together with a message indicating which light is not working.

Bulb failure If the symbol  lights up, this

If the symbol means that one of the turn signals lights up, this means that one of the turn signals (front or rear), headlights, brake lights, rear lights, fog lights or the rear fog light is not working.

WARNING
Х Bulbs are sensitive to pressure. The glass can break when you touch the bulb, causing injury.
Х Incorrect handling of the high-voltage element of xenon gasdischarge bulbs* can have potentially fatal consequences.

Note
Have the components repaired or replaced by a qualified workshop.