Picked up my new A3 Sportback Tdi 170bhp last week, absolutely lovely! So much more refined and speedy than my old Mk4 Golf, although the rear is not as practical for load-carrying (a bit disappointing considering the "Sportback" ethos). I can remove the two rear outer headrests, but cannot remove the middle one. Despite pressing the small button, it will only raise about 5cm and no more. Is the middle headrest supposed to remain, or does mine just require some extra brute force?