Camper Essentials Mercedes Vito Vianno One Piece Awning Rail The Mercedes Awning Rail is a single piece of aluminium rail which is discreet but smart, with shamferred ends to prevent your awning being snagged. Supplied as a self-fitting kit. It is very easy to fit as the rail has pre-drilled holes, meaning you just need to decide where you want it located – either as pictured or, if you want it completely out of sight, you could put it in the gutter channe