We have both the MB100 & MB140 and they are both Van Chasis.
MB100 is shorter by approx 300mm+- Both have petrol & diesel driven engines which is placed under the front seats!
These versions are made in Korea by SsangYong but carries the MB badge and is known as Istana in Korea. These are combi's (PeopleCarrier)11/14 seater
The model I have is a V638 chasis or Vito which are made in Spain which double up as a Van/Combi/V-Class and they are equipped with Common-Rail Direct Injection (CDI) engines 108/110/112(Diesel) as well as petrol driven ones(113/114)
Mine is a 112CDI Traveliner 9-seater (3 Up-front/6 Rear-compartment) with sliding doors on both sides and a rear hatch door. Great vehicles to have as they are multipurpose but stop short of a sedan feel when driving. Have fun.