I have a 2005 Mercedes E320cdi avantgarde which has done 104 th. miles. It is a wonderful car, powerful and economical. Looks great and is lovely to drive. Can't really fault it. It had done 85 th. miles when I bought it for 10 grand from Cardealwarehouse. Amazing value for money.
Everyone with a E320 should have the Radiator checked,theres a fault causing the coolant to mix with the transmission fluid this in turn will destroy the gearbox, mercedes will not issue a recall but will check the radiator and let you know the good or bad news. This should be a recall as the fault is in the radiator from new.They replaced my radiator under warrentry but a family friend had to replace radiator and gearbox.
I bought mine new two and a half years ago. Its the facelift model with the common rail diesel system and the on board computer. It has had numerous faults including a total shut down by the "computer" as a sensor detected a brake failure. It turned out to be a faulty cooling fan in the fuse box or so I was told. The accelerator pedal sticks and squeeks,the vanity lights all failed,the central console that operates the windows failed and one of the rear light clusters was replaced.The drivers seat squeeks and the steering wheel rubs against its housing. The fuel economy and performance is outstanding but I would be very careful about buying one second hand. Mine has done 60,000 miles and smokes like an old bus. The dealer who is now owned by Mercedes tell me that the black clouds of smoke on even mild acceleration are within acceptable limits and I may have to run on Shell diesel only which is very inconvenient. It really does smoke ! The car is very slow to warm up in the winter and the alloy wheels get filthy with brake dust that is difficult to clean. I would not have another and with £600 for the 4th year warranty ( which you could not afford to do without) it makes for expensive motoring, I mean how much fuel can you save for £600 and the enormous costs of servicing. Many garages do not have the equipment to sevice these "electronic" cars so you are stuck with the main agents or as it is now Mercedes direct.