hi there im new to this forum and i need help with a car im looking to buy. i went to tedt drive the car lastnight its a six year old e320cdi auto when i first got in the car and drove away it only got up into third gear (i think) on quite a long road and the revs were quite high. after about three miles i pulled over switched the car off and re-started it and everything was fine. the car has covered 56000 miles it has had one owner and full merc history. is it ok ? many thanks for any help you can give me.