Iirc some of the t5 locking threads talk about having one person repeatedly operate the unlock button while another person thumps the outside of the door with their open hand near the lock actuator to jolt it at just the right time and once you get the door open don t close it so it can t deadlock again.
Vw t5 sliding door lock mechanism removal.
Swing door handle 1 out of door.
Pull lock cylinder 2 at right angles out of mounting bracket of door handle.
Quick video on how to remove the lock and handle mechanism from a vw t5.
The battery is likely dead and needs to be replaced but the remote s may also need to be reprogrammed to work.
Then check function with sliding door open.
If this happens the problem is with the remote.
A quick video of how to remove the sliding door handle on a vw t5.
My actuator seemed to be making a little effort when called to do so via fob.
All that has happened is a very small spring has broken or fallen out.
Insert door handle 2 from outside into mounting bracket.
Vw t5 door lock central locking removal of actuator and external door handle.
Installing install in reverse order but note the following.
Locks work from the switch but not the remote.
A very common fault on the vw t4 door locking mechanism is dropping the door pull.
T5 1 or t6 transporter.
A quick video of how to remove the sliding door handle on a vw t5.