How can I reset the central locking system in my Audi 80?

I recently purchased an Audi 80 and the central locking system seems to be malfunctioning. The key fob does not work and I am unable to manually lock or unlock the doors. Is there a way to reset the system to fix this issue?

First, try disconnecting the car's battery for a few minutes and then reconnect it. This can sometimes reset the central locking system. If that doesn't work, you may need to replace the key fob or have the central locking system checked by a mechanic.