Not entirely sure if this is supposed to go in the bugs/glitches section, if so, move it there.
I've only encountered this with the few trucks I drove but there are probably some other (longer) vehicles as well that have the same issue. As you can see on the screenshots, I cannot reach the red circle (checkpoint), so I can't get the menu window popped and fix my vehicle..Not every xoomer has this problem, but here are 2 (3 if you count the montgomery one, since my truck is too high to get inside) which I came across today..
https://i.imgur.com/iH1rZ2o.png https://i.imgur.com/DzqTaCo.png https://i.imgur.com/cao9j05.pngThe suggestion would be to move the checkpoints few meters back so we can use it without any issues..OR, if that's too much work, add a command or something which would pop the window if we're standing close to the checkpoint. Again, there might be some more gas stations with the same issue, I haven't really tested a lot of them out.