I can get my W124 to do the same thing with the key in the lock...sunroof pops up, and windows move up slightly (when they are halfway down)...
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