This issue also indicates a bad lock actuator.
Vw golf 4 door lock problem.
Common on many german cars.
Locks work from the switch but not the remote.
If this happens the problem is with the remote.
Here is a vid i made on fixing vw golf mk4 door locking mechanisms or rather replacing them.
The battery is likely dead and needs to be replaced but the remote s may also need to be reprogrammed to work.
Seems to be a common problem.
I also went through getting a dea.
One of the door lock jammed inside and wouldn t allow the door to be open.