I hope so.
But I don't think there will be a dramatic drop. The used car market has seriously changed in the last couple of years. Very few people purchased cars (comparably) in 2008-2010. Making the used car demand for those era of cars higher. Also it's my belief that both MB and BMW are making better and better cars since the 2006-2008 generations and because of that they're aging better and holding values accordingly. My E55 at 3 years old had depreciated 70%. A 3 year old E63 is still in the high 40s-50s.