D4 Rear Headrests

[KT@A8parts]

Hi all, i am now one of the gang and have got myself a D4 which im loving. (Shout out to Neil for his input and assistance on the purchase!)

I'm wanting the back windows tinting, however 2 places have asked if the rear headrests can be removed which i cant seem to do. In fact i cant even seem to move them at all (annoying as they are quite high up and bug me when i look through my rear view). Usually the rears have a little slot for a flat blade to go in to release the headrest, but cant see anything on these. They aren't heated or electric rear seats.
Worst comes to worse i'll just take the rear seats out prior to tint!

Any help would be appreciated!

Katie