It’s a two seater and parked tight to one side in the container. Agreed if you’re big you won’t get out of the door. I could just in my Defender but that is narrower. As long as it arrives in one piece then I’m fine with it. It will have scratches and dents by the time my travels are finished so I’m not that precious. I’ve bought it to use it and really don’t mind about cosmetic damage as long as it’s mechanically sound. I’m certainly not the sort of person to wash it every week or have it coated in protective wrappingSounds weird. Space left in a container with a car inside is close to nothing.
A 40' container has a width of 2.350 mm inside. The grenadier is 1930 mm without mirrors, so with at least 30mm space on one side there are at best only only 39 centimeters left on the other side. If you open the door up to 39 cm on the outside, there are hardly 19 cm free space left at the rear door gap. Almost impossible to get to the batteries. So they will likely have to climb in and flip the seats forward one after the other.
I recommend to tape some fabric covers to the rear seats and to tape the edges of the rear doors which will touch the container's sidewall with some foam (duct tape).
Forget about liability: if it happened, it happened - and no one is to blame. And you will not want to spend a week with arguing.
EDIT: I've just seen that I was too late. I wonder how emaciated they are to make it into the car.