If it is like every other power headrest, extend it all the way up and just give it a quick upward blow with the palm of your hand. This will pop it loose, and it will come free. Don't be shy, give it a good whack. The power headrests on my M5 were very difficult, to the point I thought I would break them if I hit them any harder...in the end, they came loose.
Insertion will the the same, but not as much downward pressure as you will "feel" it pop back into place. I hope this helps you.

__________________
D. Jeff Gomon

2005 X5 4.4i Sport- Highland Green Metallic / Natur
2005 330ci ZHP- Imola Red / Alcantara
1991 ///M5 - Alpine White / Black
1970 BMW 2002 - Red / Tobacco


"It's not how fast you drive, it's how you drive fast!"