I also went through getting a dea.
Vw golf 4 door lock problem.
Dawda the mechanic just a quick guide on this mk5 golf.
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.
Seems to be a common problem.
The door lock works in only one direction.
Locks work from the switch but not the remote.
One of the door lock jammed inside and wouldn t allow the door to be open.
The battery is likely dead and needs to be replaced but the remote s may also need to be reprogrammed to work.