Sorry for a late reply!
I haven't removed the rear lights from my car, but have read it is quite straightforward.
Once you have the inner light out, you need to undo the reflector housing / bulb holder (Philips screwdriver needed), and you should end up with the following;
![](https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fm87%2Fdaj197%2FDSCN6191.jpg&hash=29cdb0db3f0158e560e32d42e8a560fa98c3571c)
![](https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fm87%2Fdaj197%2FDSCN6194.jpg&hash=b6bfa4cb03c6e3bd2c811f52e489dea96e32cb96)
In the pic above you can see the plastic lugs of what is the plastic red fog light / clear reversing lens - you just need to carefully press in the lugs one at a time and then you can remove the filter;
![](https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fm87%2Fdaj197%2FDSCN6195.jpg&hash=e5ac29a1793965eabb58e4838c5aaa60ea603d3e)
![](https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fm87%2Fdaj197%2FDSCN6196.jpg&hash=9e381f673a533f5a32625ec0c56790e6c68d69bd)
Hope this helps!