Jaguar X-Type JJM 21 02 20/15 - Manual (Page 43)

Before driving 3-11
Automatic locking retractors
All passenger’s seat belts (not the driver’s) have an automatic
locking device for use with child seats. The belt, once fitted to
secure a child seat with all the slack removed, will automatically
lock in this position and further extraction of the belt is
inhibited.
To activate the static reel (child seat) mode, pull the belt to its
full extension to engage the ratchet mechanism. With the child
seat in the required position insert the belt’s tongue into the
buckle. Retract the belt back onto the reel; a ratchet operation
may be felt as the belt retracts. Continue to pay the belt back
onto the reel until it fits snugly around the child seat.
Unbuckling the belt and releasing the child seat will allow the
belt to resume its normal operation.
To release the seat belt, press the button on the buckle unit and
allow the belt to retract into the reel.