what does that button do?

[mya3]

hi all theres a button on my a3 its on the B-post behind the door, its got a little square on it with wot looks like a radar thing wot is it?

[stuart]

Hi

If you press this before locking the car, it switches off the ultrasonic sensors for the alarm system (factory fit that is:)) Just incase you leave anyone in the car.

It then resets when you unlock....

Sytuart