the alarm keeps going off. is there a way of lowering the sensors it also goes off when the sensor is switched off

I believe you can edit the sensitivity of the interior motion sensors with Vag-Com, though I'm unsure as to which block you need to edit.

Are you leaving your windows open, have you tried pressing the button on the a-pillar to turn off the motion sensors? If your alarm still sounds when the motion sensors are turned off you need a vag com to find out which sensor is tripping the alarm.

Here you go:
http://wiki.ross-tech.com/wiki/index...ior_Monitoring
I set mine to 50%. If the windows were cracked open and there was as slight breeze the alarm would be triggered even at 75%.