StuF

I've got a 09 Galaxy 2.0 TDCI that has a intermittent starting problem When it fails, I turn the ignition key, all lights come on and go off as normal but then turn key to start and nothing. I've replaced the battery. The car started normally 3 or 4 times and then the same again. The rescue bloke just jump started it. The car runs / drives without a problem or any warning lights coming on. Any ideas what is could be? Loose Connection / Relay / Alternator?