hi. can you help me on my 04 audi c5 a6 central locking, ive just fitted a replament ccm box. with all matching numbers. every think works about from the central locking, it locks ok but dont unlock even when you put the key in, but when you disconnt the battary and reconnt it it works for a min unlocks and locks but when you lock it by thre lock it dont unlock again even thre key fob dont work 

I had a similar issue abd it was the drivers door lock mechanism which was at fault as it controls the remaining doors. An an auto electrician take a look and cost me £120 to fix.

Cheers

Steve