 I like my TDI very much but there is an issue with finding a small automotive diesel fuel fill nozzle in rural areas.   The big nozzles used at truck stops and most small town gas stations that sell diesel will not fit in the TDI fuel filler opening.  When in dire need I have held the big nozzle against (not in) the opening and slowly added fuel.  This is hard to do because the truck flow rate is also much higher than the VW can accept - so an overflow onto your shoes is very likely.  Because of several bad experiences I always start looking for an automobile diesel pump way in advance of running out.  McGyver-types will figure out how to survive but this is something that needs consideration