This TSB applies to 2000 to 2014 Audi models including the Q5, R8, A6, A8, Q7, A4, A3, TT, Allroad, A5 and A7. Central locking via the remote control does not work either sporadically or permanently, but the locks can still be operated manually. Missing synchronization between the remote control key and vehicle may occur because the battery has been disconnected or the battery in the remote control has been replaced. If other senders operate in the same frequency range (mobile phones, TV st