The lane change assist system in your Audi A3 can usually be turned on or off using the car's infotainment system or settings menu. The specific steps to do this may vary depending on the year and model of your vehicle, so it's best to consult your owner's manual or contact your local Audi dealership for assistance.

Unfortunately it is not possible to turn the system off permanently, as it will reactivate automatically when the car is switched on.

Also if you indicate when overtaking a cyclist the lane departure warning will not activate.