Instruction book AUDI A1
 Audi A1   Controls   Instruments and warning/indicator lamps  Warning and indicator lamps
If the indicator lamp or flashes, the turn signals are on. If both indicator lamps flash, the hazard warning lights are on.
If one of the indicator lamps flashes twice as fast as usual, a turn signal bulb has failed. You should have the bulb replaced without delay.
Note
For more information about the turn signals and hazard warning lights, refer to Link.

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