Eh shy lah, bro Diesel, I am certainly no expert - just learning together with all of you about the marvellous cars we drive. Diesel engines are quite robust, and relatively simple. The air taken into the engine is squeezed down to 1/16th - 1/22 of its initial volume, and then diesel is sprayed into the combustion chamber which auto ignites. The reason the injectors and nozzles are the weakest link is because they are exposed to the brunt of the diesel "explosion" that gives you the power stroke. At the moment, I can't really pick out why stalls have occured in your and DKNY's machines, but perhaps the airfuel mixture or injection timing could be out. Wonder if the boys at the SC have the know how to check these. Dirty diesel is more likely to cause fouling - coke build up and more soot out the exhaust... and eventual loss of efficiency. Let's keep each other updated - wonder if there are any experiences by the more mature 5-er dieselers - calling calling!!
Personally, I have had one occasion when I had to crank the engine twice to start - but it was early morning and a rainy day. No more instances to worry about since then, but will continue to monitor.
RCBL - I had my oil & filters changed at 2200km's post run in too, a "cleansing" exercise, which I firmly believe to be a good practice, although most manufacturers tell you now that the better engine tolerances do not yield any more contaminants.