when i lock the car it beeps then stops repeatedly every 10sec!
 

i have an 05 audi a8. when i lock it 10sec later it starts beeping like the alarm is about to go off then stops. then starts back up again every 10-15sec.... i had to lock the car really fast then disconnect the battery in the trunk over night so there would be no power at all in the car cause i cant find a way to make it stop! the beeping sounds like its coming from the passenger side near the fuse box. someone please help!!

Sounds like a faulty door switch which keeps triggering the alarm. Either the plunger broke or the connector is loose, worn out, etc.
Each door, the hood and the trunk will have one of these under the rubber boot.