VW Golf 4 door lock problem 1 

If Your vw golf 4 some door locks are locked and won't unlock, then one solution is to make a hole in the door panel to get access to lock mechanism and force locking mechanism to unlock.
Car in this video is VW Golf 4 Made in Germany 2002
This is the first part of 4 part video.
Where exactly make this hole, you can see at the beginning of fourth part:
• VW Golf 4 door lock pr...
Here's second part:
• VW Golf 4 door lock pr...
And third part:
• VW Golf 4 door lock pr...
In this video shows the problematic doors which are locked, and how to remove inner door panel even if the door is closed.
Door locking mechanism stays in this so called "Safe" state.
About how to remove inner door panel, you can learn from this video:
Golf Mk4 Door Lock Mechanism Fix
• Golf Mk4 Door Lock Mec...
From his video you can learn, how to do everithing right.