not sure if there is any fuel available at the cite europe complex itself [especially out of hours] but there are a number of petrol stations around calais anyway. if you were refering to height barriers in regard to parking up overnight then there isnt, as long as you follow the signs for the coach parking area,it is next to the police station along with the camping car [motorhome] parking area . if you go on the cite europe website [has a english version] along with the list of facilities opening times etc it even gives gps co ordinates etc . if you travel via the shuttle you can see it through the fence . infact what i usually do is not bother parking up this sde of the tunnel at all but just follow the road round when leaving the shuttle in france and rest up there for a while before heading south.