Wondering if anyone could shed any light on my rather annoying problem. I have a 2.0 TDI 170 avant which every so often takes a period of extended cranking to get it to fire up. It happens randomly, can be parked up for days and start first time, other times it refuses to fire up first time if left overnight. There are never any fault codes stored. Took a while to get going this morning, scanned for fault codes using a Snap-On SolusUltra - no codes. The fact no fault codes are ever recorded would point me to an actual 'mechanical' fault - maybe a fuel pressure problem via lift pump, tandem pump, injector seals?? Anyone suffered a similar problem and have any pointers?? Thanks in advance.