One for the mechanics please. After a long rebuild I finally have my 300 tdi on the road but im having trouble starting it. I took it for a 45 minute run stopped for 15 minutes went to start it again and it sounded like the battery was flat. Only just turned over three times and that was it. Turned ignition off turned it on let the glow plug light go out and it started fine. Tried it today and it struggled again even with heat. This isn't a new thing since the rebuild. I thought it would be solved with a new battery but that hasn't helped. As far as I know all wiring connections are good. Could it be bad alternator not replacing charge from starting or bad starter motor or something else.
Thanks for your time