Audi A4   Controls   Instruments and warning/indicator lamps  Warning and indicator lamps
If the indicator lamp lights up or flashes, a malfunction has occurred which can reduce the quality of the exhaust gas and damage the catalytic converter.
Drive slowly to a qualified workshop without delay and have the fault rectified.

All images, logos and text are property of © Audi. This site has no relationship with the company Volkswagen - Audi Spain nor any of its affiliates worldwide. For more information.