Make sure you order 7 quarts or so of the trans fluid. I assume they've at least filled you guys in on the fluid requirements and filling procedure on the 722.6. You need the special tool dipstick and hopefully they've given you a diagnostic tool which will allow you to read the trans fluid temp, such as the dealers use (Star Diagnosis System). You may as well order one of the locks for the dipstick tube cap. I assume the Crossy has no dipstick either, just the cap on the tube.
If you don't have any of this, I'd get ahold of somebody at MB or Chrysler to make those stogges at the MB dealer "play ball" until you get your own equipment. Those guys need to get a life.