Yeah, my older brother has one; same one that owns a 2006 E-class CDi. I think his is newer, perhaps 2009? Not sure. Anyways, he indicates 24, perhaps 25MPG highway and 19-20 around town. I've not heard of any real problems, but I'll leave it up to the dealer technicians to scare you off! He does like it, it's a great kid hauler/practical vehicle.