X5's can't pull off yellow, and definitely not that shade.

Well, at least the car doesn't have any decals, graphics,or stickers applied on the body. I imagine this car to have been a truck brought to shows with a ton of graphics applied throughout the body as a form of advertisement.

Thanks for comments.
But this Х not mine) I only show it for you.
This car belonged to the girl therefore has been painted desirable colour.

To itself I never such colour would take... and if took yellow X, it's will be phoenixyellow or dakaryellow colour with 21" rims and aerodynamic pack, as you say.