TM   9-2320-363-10 1-11. DIFFERENCES   BETWEEN   MODELS. Vehicle  Model Item M915A2 M916A1 M916A2 M917A1/ M917A1 w/MCS Engine  Model  DDEC  II X X Engine  Model  DDEC  III X X Manual  Ether  Quick-Start X X X* X* Automatic  Ether  Quick-Start X X Transfer   Case X X X Driving  Front  Axle X X X Highway   Tires X On/Off  Road  Tires X X X CTIS X Spare  Wheel  and  Tire X X X X 2-Way  Sliding  Fifth  Wheel X 4-Way  Oscillating  Fifth  Wheel X X Hydraulic  Winch X X Tachograph X X Datalogger X X Air  Conditioner X X *Initially-built  M916A2  and  M917A1/M917A1  w/MCS  have  manual  ether  quick-start system. 1-15