I did the rear pads on my ML this summer. The front and rear crossmembers are pretty stout as are the diffs (this is an off-road vehicle).
I jacked up the ML on the diffs and put jackstands on each crossmember. Kept things steady for the entire project...
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car