How to troubleshoot Audi 80 door lock failure?

My Audi 80's door lock is not responding and I cannot access my car. I have tried using the key fob and manually unlocking it but nothing seems to work. What could be the possible cause of this issue and how can I fix it?

Seems like the issue could be with the lock actuator not functioning properly. Try checking the wiring and connections of the actuator and see if there are any loose or damaged wires that may be causing the failure. Also, consider getting it replaced if necessary.

Another common cause of door lock failure in Audi 80 is a faulty central locking system. Check the fuse and replace if needed. If that doesn't solve the issue, it might be best to take it to a professional mechanic for further diagnosis.