EESDL
If there isn't any cargo the Mk5 will take ballast in the form of bottled water or boxed sand!!
SS
One selling point of the 'J' was the ability to palletise everything making loading easier. The Mk5 taking baggage has to be either manually loaded by passing all the bags forward by hand or you have to re-install all the pax seats down the back once the baggage pallet has been put up front. Obviously you do the reverse to offload - what a clever step forward from the 'K'lassic where you put the bags at the back!