2017 Kawasaki Mule PRO-DX EPS LE Diesel, The 2017 Mule PRO-DXâ„¢ is our powerful, most capable diesel Muleâ„¢ Side x Side ever. Built on the same rugged platform as the Mule PRO-FXâ„¢, this innovative Side x Side comes equipped with the largest cargo bed in class all while offering comfortable full-size three-passenger seating.