I may be completely mistaken but it doesn't seem to me to be a missing cylinder. It's not as if just one cylinder is not firing but if the engine is shut off momentarily as if the fuel supply is cut off.
I may not have enough experience with diesels to be making this judgment but I know that when my 300d starts in the cold and it only hits on a few cylinders for a few seconds until it catches, it doesn't sound or feel like this 'hiccup'.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13