The BMW is the 2011 model, has been driven for 200 kilometers, original price 140000, now selling for 110000, has Rear seat entertainment, while the Mercedes is 140000, new, and is custom fit with options according to our selection. Which one should we choose? We have a 1998 W140 S320, and we like (Biased) the S Class better, but we like the 750Li's price and the rear seat.