The lock of the automatic back gate wasn't finishing to close and lock the door, the problem with the Audi design is the gate motor doesn't finish the closing process, there is a small motor in the lock that finishes to close the door but it has a spring that returns the lock to idle position, the spring broke and then the door didn't close completely. I took out the lock and replaced the spring, if I'd bring the car to the dealership they would charge me hundreds of dollars to fix that. Crappy design AUDI.