They do have it!

A while back we had a photo of the VW plant that uses a Robot to park the finished cars well its real also and like some of use said it the first one trapped cars!
 
http://news.yahoo.com/s/ap/20070129/ap_on_hi_te/robotic_garage

they have to park the mercedes-benz within 45 seconds, or else the motion sensor will trigger the alarm.

quote:

The driver stops the car on a pallet and gets out. The pallet is then lowered into the innards of the garage

 
Better make sure the ebrake is on versus neutral