This is from the Model S user manual, but I assume it is the same in the car:
Why does it look like the icon in my Range Rover, and not like a Model S? Weird.
Maybe it's a standardized icon?
The Royalty Free Clip Art Library is still lacking. Maybe look for it to change in a future firmware update? :)
My guess is that the Range Rover was one of the first vehicles, if not the first, to have active air suspension and so the Range Rover icon became the standard.