Driller, I am not familiar with your car, but a hesitation is either not enough fuel or weak ignition, I would test for one or the other, these can be very difficult to track down, I am trying to find mine as we speak.
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)