The gap between a 2006 Acura MDX and BMW X5 is pretty wide, the Acura is a step down. The Germans still have it, the old ML was a pos, the new one is rather nice. Still not an ML fan.
I sudjest one actualy drive and live with a late model MB for a while before passing judgment. The W140 is a BETTER car than my W126 in so many ways. Buy both and you will understand. The new W221 makes my old W126 look and feel cheap. The interior is in on a whole other level.
My dads friends son just turned 16 and got a 1989 Camry. Yeah it does get you there I gues, makes a bike look tempting though.