I just bought this car and previously had a 2000 Volvo S-80 T6. This car is an outstanding road car and the low torque diesel provides excellent passing on the highway. It is as quick as my Volvo S-80 T6 and as smooth on the highway but with much better gas mileage and, I hope, a better built and longer lasting engine. One problem that has already surfaced that I hope Mercedes Benz is quickly working to correct is a shifting problem when starting out - the gears shift back and forth between first and second in a jerking motion. The problem duplicates when using the manual or automatic mode even when I try to start out in second gear. MB is aware of the problem and are investigating.
I traded a 2005 E320CDI for this 2007 BLUETEC. While my 2005 was a very good car, the handling of this BLUTEC is much improved, particularly the steering. The outside mirrors also are improved. I also have a transmision problem, it shifts jerky on take off, in first and second gear. Had it at the dealer several times for this problem. The dealer did confirm to me that Mercedes is aware of this rough shifting and is working on a solution. I was told it has something to do with the tourque curve of the diesel engine. I was given a Mercedes code number and was told the fix would happen after January first. I am sure Mercedes will get a handle on it very soon.
2007 E320 Bluetec V6 Diesel, Nothing major but bunch of small stuff that disables car for days. Cracked inter-cooler hoses, failed Mass Air Flow sensors, Failed EGR valve, Clogged DPF filter, scary one was when fuel filter clamp failed, sprayed fuel on hot turbocharger and ignited, my lucky day I was standing in traffic so I was able to see cloud of the smoke coming under the hood and can of soda put the fire out (I should let it burn). All this under 74K miles. This is my 8th Mercedes and seams that newer the car more problems with it.
My 3rd Benz. 1990E class loved it.2000 S500,had trouble with it. Now this Eclass.So far great. I tend to go back and forth between Benz, BMW,and Lexus. I wanted good mileage, but more fun luxury and performance than a Prius, which I drove as well. I am dissapointed with the direction of the Lexus hybrids(poor mileage). It came down to the Lexus GS450h vs Benz E320 bluetec. Benz won this time around.
This diesel engine marvel is everything others have said about it: quiet, clean, LOTS of torque, and great gas mileage! Driving the car home from Texas I drove from Amarillo, TX to Holbrook, AZ on less than a tank of gas. I then drove from Snowflake, AZ to Salt Lake at 75-80 mph via Flagstaff (625 miles) with fuel left over for a few days of driving around town. Climbing mountain grades and passing other cars was effortless. The ride and handling were amazing. This is my first Mercedes and first diesel powered sedan. Given my experiences so far, I'm not going back to a gas powered car. It has the navigation system, which is nice, but easily outdone by my iPhone. It also has the Harmon Kardon audio system which is great. While it's almost 10 years old now, you wouldn't know it by how it handles.
Later: I've had the car for 8 months now. In that time it's had a few rather expensive repairs. I've had to have the o-rings in the oil-cooler replaced, the turbocharger has been replaced and there was an issue with the valve-body controller of the transmission. None of these have been cheap. I was fortunate I could swap out the turbocharger when I had the engine torn apart to replace the o-rings. I winced at paying $2000 to replace a $10 o-ring. But that said. I still consider myself money ahead on the vehicle. In real world driving I've gotten as much as 40mpg on one leg of a trip and average about 30-31 mpg between commuting to work and driving around town. The body and interior are so nice, people are surprised to learn it's a 2007. Would I buy this car again? Probably. Will I drive anything other than a Mercedes? No way! When I ride in other cars, I can tell the difference, both in noise levels and ride quality. It's superior to any Japanese or American-made vehicle.