As for the CCV/PCV, As I don't know if and when it was replaced, I've got an OEM one to fit, It'll be less than a year old.

I do have the rear self leveling suspension but it doesn't leak and the bags seem in good condition.

Ideally I'd love to park in underground garages or something covered but I'm not sure its an option when runing around the country and sleeping in hotels. We'll have to see what we find.

You do bring up a good point, engine warm up time. My car as of today wil take about 10 minutes to get the water to the middle mark and the oil will usually take over 20 minutes from startup to get at its running temp (a bit below the middle mark 100°C). Is that normal or do I have an unknown issue?

I've tested the webasto heater with the timer. It ran for 30 minutes then stopped, when I got in the car as soon as it stopped, the coolant showed at about 1/3 of the temp gauge and got down to a quarter as soon as I turned the engine on. The outside temp was about 2°C+wind. So it works and will be quite nice during the trip. I just need to check on the remote module and either get a complete kit or just the remote.

This is great news for the door carriers, you've probably just created the greatest mod of all for X5s. I will be following in your footsteps shortly, I like the idea of not having to change the door carriers regularly. Thank you soo much for your efforts.

You should probably create a topic just for this mod as I'm sure other will enjoy it and maybe even erect a few statues in your name.