I had this problem. I had to remove the seat from the car so I could get the back of the seat vertical, and separate the back of the seat from the base to get enough slack. Fairly straightforward. You will need TORX (Star shaped) screwdrivers. 4 x T40 screw hold the seat in place, 2 x T50 form the pivot for the seat back - these need to be removed. Several T20 self-tapping screws hold various plastic covers in place. These must be removed to disconnect the two cords that are attached to the seat hooks. Disconnect them at the bottom. Look carefully how they are fitted before you remove them.
Greywanderer., August 2010