Complex sentence: German versions originally used a similar Dailmer-Benz model, but later moved to a MTU design of 1500hp, which could be easily swapped out of the tank, along with the drive train, in 15 minutes.
Split into simpler sentences: German versions originally used a similar Daimler-Benz model, but later moved to an MTU design of 1500 hp (1,100 kW). The MTU unit could be easily swapped out of the tank, along with the drive train, in 15 minutes.