I installed a rear track bar on my Ford Sunseeker and it helped with bow waves of overtaking trucks as well as trucks traveling in the opposite direction on 2 lane roads.
As It was explained to me , Its suppose to eliminate the slight side to side movement of the rear axle . The track bar attaches the rv frame and axle shaft making it a solid connection.
Without a track bar that movement gets transferred to the front axle affecting steering. It helped with bow waves but didn't eliminate them completely.
Imo, out of all my aftermarket mods, the track bar gave me the most bang for the buck. I would imagine that it would have the same benefit on the Sprinter chassis.
