What made you go for one?
Erm, well they are quite uncommon which I like, second they are safe & practical for the kids, third they look ok (ish) for the kinda car, and I've never had a Merc.
Also nothing by VW/Audi tickled me for the budget tbh. Had a Touran, Din't want a Q5. Passat estate is a big Golf 5, which I already own...
Nearly bought a BMW 320d M-Sport, but they are like opinions round here...