I have a 54 plate Doblo 1.9 diesel turbo. My wife phoned me saying it will not start. On taking a look I guessed the battery had packed up, so bought a new battery, connected it up...... and the symtoms were the same as a flat battery! So I then jumped it from our car, drove for about 15 mins turned the engine off then tried to restart, engine turned over about 1 rev then nothing. there where no "not charging " lights on while driving. any ideas what is wrong.