MONTVALE, N.J., May 1, 2015 /PRNewswire/ -- Mercedes-Benz USA (MBUSA) today reported record April sales for the Mercedes-Benz brand with 29,188 units, up 12.8% from 25,887 sold in the same month last year. Sprinter posted a gain of 15.5% to 2,764 vehicles in April, combining with 480...