I have been very pleased with my E320 CDI in the year I have had it. My mileage has been between 33 and 35 mpg, and even higher on longer trips. The car has excellent pickup and is much better than the diesels I have owned in the past. The only problem I have had is that the clock in the dash gains a couple minutes a month and it is not exactly easy to reset. The dealer told me that this gain per month is within tolerances, but none of my clocks gained that much in the past. I have had one burned taillight in the year I've had the car, and one recall to repair the computer assisted brake system. All in all, it is an excellent car.
Excellent economy for a larger car. Excellent pick-up. Comfortable ride. Quieter than previous diesels.
Improve the clock so that it keeps more accurate time and is easier to reset.