Since I can't buy new, I'm playing the options game - how to find as many options that I want in the best overall package.

That being said I realize that I'm making assumptions on the lack of feasibility to change some options and that I should ask the community what is possible (especially having learned that adding a wood steering wheel is doable). So, which of these are possible and not cost prohibitive:

1. Headliner - I love the dark headliner but it isn't that popular (and it was an extra cost). I'm assuming that this would prove difficult or too costly...
2. Illumination package - I love the look but I can't imagine that this would be feasible.
3. Adaptive cruise control - after looking at roughly 300 used Jag XJs for sale nationwide and I think I've only found 2 with it. Again I don't imagine this can be added after the factp, but it would sure be nice.
4. Wood steering wheel - saw in previous posts that this is possible and not necessarily difficult to do.

Thanks for reading, thanks for commenting!

1. Possible but costly, and many trimmed parts are on 6 month lead times. If it is just a fabric change it is usually cheaper to have a good vehicle upholstery shop match the fabric you want and re-cover your existing head liner.

2. Possible with modifications. I did this to my car as it was not an option in 2010. You need the six illuminated vents (used are sometimes available for around £300, new cost is over £1k). You need to splice into the existing illuminated switch circuit to wire them in as the connectors will not be present. The rears are dead easy, the fronts require some disassembly of the dash/fascia.

3. Possible but get your parts right as it is easy to get it wrong. Early cars (I forget the VIN change, but think it was 2013) used the same system as the X350 with a separate sensor and control module. The later cars used the all-in-one sealed module. Of those, there are two main variants - one was fitted behind the bumper to the left, and the other fitted centrally behind the radiator grille - and those also contain sub variants. The modules cost around £1,200 new, used are much less but be sure to get the right ones as there are so many variants. In all cases the engine-bay wiring is present with the connector simply attached to a blanking socket on the bumper bar. The two-module variant is lacking the wiring in the dash/fascia. You would need to add that yourself. You need to change the cruise control switch on the steering wheel. Then the vehicle CCF needs to be recoded to add the feature.

4. Very easy to do - takes all of 5 minutes to pop the air bag out and undo the bolt.