Instruction book AUDI A1
 Audi A1   Controls   Doors and windows  Central locking system
The LED on the remote control key lights up when you press the buttons.
The LED Fig. 1 (arrow) lights up as soon as you press one of the buttons.
The LED should light up once briefly when you press one of the buttons briefly. The LED should flash repeatedly when you press and hold one of the buttons (convenience open/close).
If the LED does not flash, this means the battery is exhausted and must be replaced Link. In addition, on Audi A1s with driver information system*, the indicator lamp * in the instrument cluster display will light up and a message* will appear:
Please change key battery

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