I am curious about which of these cars would give me better service they both have close to 160,000 miles on them and seem very clean and well taken care of. I am a little familiar with the 2.5 turbo but the e300d seems to have a 3.0 litre twin cam turbo . I am not afraid of doing mantainence but i enjoy diesels and have a 50 mile comute daily thanks for any advise Peter