having had a couple of them and thinking of the the things that went wrong with ours i would say a d2 isn't a very fixable on the side of the road machine , i'd be more inclined to spend money on a really good going over of mechanicals before you set off , things like a set of hoses would be a good idea to carry, maybe a spare air bag and ride height sensor and a nanocom perhaps after that make sure you have breakdown cover