[PlasmaKrab]

Hopefully someone's got better info, but I did hear a wile ago that the early BMDs couldn't be reliably dropped and driven off, though that was what the original concept called for.
Apparently for reasons of reliability and weight, the BMD-1 and BMD-2 had to be dropped separately and empty, and loaded, crewed and started clean on the ground.
The BMD-3 was supposed to overcome this problem using reinforced suspension and new parachute loads.
I'll see if I can still find sources for this, but anyway I advise looking up data on the BMD-3 (and said improvements) as well as reports on last year's Sino-Russian airborne exercise (saw deployment of both Chinese and Russian mech airborne units with newest materials).