A friend of mine bought a Mercedes E320 last year, on an 04 plate. Immaculate, and I must admit it had me going slightly green at first. One year on and a brake repair cost him £1,500, now he's looking at another £1,500 for a gearbox repair. Maybe that's why we're daft enough to own thirsty cars!. And to be honest, averaging over 30 mpg on a trip this week, I think is pretty good for such a big car.