I went for the sunroof package, which gets you the sunroof (duh), the power rear sunshade (very cool to show off [

] ), rain-sensing wipers (one of my favorite features), auto-dimming rear/driver's side mirrors, and the programmable garage door opener buttons on the rearview mirror. I also chose the MB CD changer in the glovebox and the 5-speed driver-adaptive auto transmission. Someone here may yell at me for saying so, but I think MB makes way better automatics than manual transmissions. And this one is really great. Holds gears well, has the comfort (winter) mode button, and the touch-shift feature for taking the shifting into your own hands.
All options I picked, I would consider "must-have". Options I WISH I had chosen are the Sirius Sattelite radio option ($400 from factory, now $679 at dlrshp [

!] ), and the split-foldown rear seat option would have come in handy already. The upgraded sterio would be nice, but I think I can do better for less money on my own with that. I would LOVE to have the hands-free phone option, but total cost for that is around $2,200 - $2,600 and that's just too much $ for me. My cell has a speakerphone and I have one of those little rubber mats that keep it from sliding off the armrest--Voila, hands-free communication! [

]