FWIW - just spent a week in a GL 350 Bluetec as a loaner. Couldn't wait to hand it back. Impressive fuel economy for a big 4x4 but it's as wide as a barge, handles like one and the drive-by-wire throttle/engine/gearbox combo means the car has a different agenda to your right foot. I also drove the new RR Sport recently in V6 Diesel - blown away by how good it was. Now wondering whether I could live with the image it has...
