Hi guys, Am new on here and really need help, ive recently purchased my first x5, a 2002 diesel. Going to work the other day it struggled to start, halfway to work it stopped as though it had ran out of fuel, (half tank in car), turned over several times starting and immediately cutting out. Finally started again and ran for a bit before stopping again with fault message "fuel injection E" on dash. Got recovered to local garage where fuel filter was changed due to what he thought was an air leak. Fault code says low rail pressure. Any ideas???