Acoustic comfort package is like S-Class. Double pain windows for quiet! I definitely want that. And heated arm rests. That and heated steering wheel would be boss after cold ski day. I probably get one of these when my E500 is done in a few years.
An S550 4matic, while not a wagon, gives you all that luxury for less money if you were inclined. I would get S550 AWD if it had split folding but it does have a trick roof rack.