My wife wants an everyday large luxury sedan, and has settled on the S550. The redesigned S-Class is due out this spring (April??) as a 2014 model... She wants the current generation for a discount. Assuming the current generation sells at an appropriate discount we'll be looking for a 2010-13, but most likely an '11 or '12. Almost certainly CPO only. Any updates between model years I need to consider? Any recurrent issues? Any thoughts on the 4.6L Turbo (2012) vs the 5.5L V8 of earlier years? Anyone have insight as to when the price hit on the previous generation is really priced in when a new generation is released? Is it at showing,... when the new model is in the dealer showroom,... later?