Yesterday the central locking on my audi a4 packed up. The fob disarms and arms the alarm/immobiliser but the doors will not lock or unlock from it. I have tried the key in the drivers door, this just locks/unlocks that door, the others do nothing. I have also noticed when i try the fob i can hear (what i presume to be the central locking unit) a motor whirring for about 10/15 seconds then it stops. So, am i better off getting an auto elctraician out ot have a look, or a local audi specialist? I rang this morning said they can hook it up to a diagnostic machine for £47 plus vat and tell me whats wrong? i would prefer the most cost effective method if possible. please fellow audi owners, help me keep the faith that german cars really are the best on the road!!