TBH if you cant remove the bumper fitting a tow bar will not bode well. Bumper is as easy as lego blocks.

The jaguar electrics do not like anything other than the genuine electrical pack from jaguar and it may need configuring in when fitted.

If you fit a standard electrical kit you may experince many other electrical problems.

My X-type was a nightmare even with the genuine electrical pack fitted ( about £400.00 ) and the jaguar dealer admitted they hate getting involved with them! there again one of my x-types i fitted tow bar and electrics to and off they went as simple as that !