Hay guys, it seems sometimes that when it rains it pours, lol!

In the last couple of days, my E320 CDI is experiencing as I can best describe it as a hunt during cold starts. The engine has a rhythmic hunt or, better stated a surge upon cold starts the lasts about 10 minutes and then it runs normal! The fuel filter was replaced about 2 years ago and I've only put 12,000 miles on the car since!

I just don't have the vocabulary to descibe it better, when I was a mechanic some 20 years ago we would describe this problem as a hunt, like hunting for an idle.

my past thread about my turbo making a whistling sound was exactly that, an air leak. Thank you

Any codes? That's where I would start.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 158k miles
06 E320 CDI "Rutherford", Black on Tan, 177k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 72k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

Any strange odors from the tail pipe when you cold start it ?

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92 e300d2.5t
01 e320
05 cdi
85 chev c10

There's a pretty good thread on 05-06 E320. It mentions injector seals can commonly go. You may want to check those as well.
2005-2006 E320 CDI Buyers Guide, Common Problems, & Roll Call

-Matt