My A5 has stopped locking with the keyfob. When i press the lock button i can hear a sound to indicate its locked and the alarm will arm however the car door will remain unlocked.It will lock if i use the key inside the fob.I have tried changing the battery however it made no difference. If i try lock it with the keyfob the headlight will no longer flash however if i lock it with the actual key and then press the button it will flash. Any help will be appreciated as i feer taking it in and the mechanoc trying everything under the sun when it coukd be simple. Also my passanger door does not open and the handle feels like its loose. I have read many post about this being a common issue but i wonder if the new issue is connected. This was fine when i bought the car however started shortly after purchasing.