Hi, ive decided to buy a 2nd hand Mercedes E270 CDi and need some advise, its a 2001 and it has 140,000 miles on the clock. Im a little worried about maintenance costs over the next few years, any idea what i can expect? im thinking this car should go to 300,000 miles with this engine easily enough? any advise on what i should look out for when i test drive it? anyother info appreciated thks!