Received turning diameter info from Ford:
Thank you for your interest in Ford Motor Company and for your interest in our E-350 and E-450 DRW cutaway chassis vehicle. The maximum degree of wheel cut that you have requested is not a measurement that we normally make. However, we do have the turning diameter of the E-350 and E-450 DRW cutaways. Turning diameter is defined as the diameter of the outside track made by the outside front tire during the shortest turn. When comparing competitive truck specifications, be sure to note whether they specify a diameter or radius dimension.
Turning Diameter (ft.)
Wheelbase Curb-to-Curb Wall-to-Wall
E-350 DRW /E-450 158” 54.8 56.2
E-350 DRW/ E-450 176” 60.3 61.8
The Curb to Curb measurement is the turning diameter in feet to the outer front tire. The Wall to Wall measurement is the turning diameter in feet to the outer corner of the bumper. The turning diameter is the average of left and right turns with standard tires.
Mercedes says their Sprinter with 170" chassis is 54.6' wall-to-wall, so it must have a slightly sharper wheel cut. Now if its nearly linear then the 2552 turning diameter should be about 72' or 6 lanes of road which pretty much rules out a U-turn with toad which would be a gutsy thing anyway.
Randall