W202 W210 Removing black palstic headrest 'holes' on top of seat back

[neilrr]

I'm swapping over the cushions on my driver seat to another working frame, mine no longer adjusts forward to make the backrest more vertical.

Does anyone know how to get the 2 black plastic things the steel headrest prongs sink into off the top of the seat backrest in a 202?

I believe it's the same setup in a W210.

 

[Auto-mobile]

You will need to look down the hole, there is a tag that locks the plastic headrest guide into the seat, it needs to be levered inwards with a small screwdriver.