I bought my S211 320 Sport over a BMW535D Touring as the BMW is just too clinical inside and leaves you feeling cold.
The handling and extra power though are better than the S211 Sport, but the Sport has a bigger boot, a far better interior and leaves you feeling less like a Chav that Beemer drivers tend to!
Solution?
Buy the Merc, get it mapped and fit a H&R Coilover Cup suspension kit.
Result - Best Sports Estate this side of an E63 AMG!