VW Golf fuel filler cap will not unlock

Have you checked for a blown fuse? You may also be able to reach the release either by reaching into the wheel well or removing an interior panel. Another option is that the latch is released but the spring that pops the door open is broken. Have an assistant try to open the door while you actuate the switch.

Some people have had a relay get reversed on them, that is, they locked their Golf only to find that the fuel flap was unlocked. Give this a try, and also try locking and unlocking your golf several times to attempt to reset things.

Locking and unlocking the car while applying a little pressure on the flap worked for me ?. Repeat if it doesn't work the first time.

Get in the car and lock all doors using the switch on the drivers door. Then unlock all doors using switch on the key. I found that this worked and the flap would then open when pushed as normal.

With filler flap in the open position, lock doors using key. You will now be able to open and close the filler flap freely. Thereafter you must remember to release the flap before locking the doors. The only downside is that although the flap is closed, it will not be locked.

I had this problem with my 2013 Passat wagon. I took the car to the dealer and the mechanic repeatedly pressed the unlock on the remote while at the same time pressing and releasing the fuel flap. It worked. He explained that the flap lock can fail in a number of ways. In my case it just got stuck and the press-release was sufficient to solve the problem. In other cases the lock can actually break in which case you just have to take it to the dealer to get replaced. I'm getting it replaced at the next service.

For any one who has found this thread and is still stuck, I solved this by:

Getting a tyre lever inside the fuel cap and gently forcing it open a bit whilst repeatedly pressing unlock on the key fob.

Once its open you can look into preventing it from happening again. I ended up taking the whole fuel cap section out and duct taping a bit of metal in the way of the lock to physically prevent it from being locked again.

This obviously means the fuel cap will never lock so bit of security risk but its a great solution in the mean time.

Pressing unlock more than once did it for me, nothing else worked, almost tried prying the whole cap off!