Just curious, how did you make out? I have noted a similar kind of effect in my 1998 E300D TurboDiesel. It happens once in awhile when I leave my driveway - the car seems not to want to move, even if the engine revs go up. I usually just let it creep along for a second or two and then give it some more gas (Diesel) and it takes off without any clanging and banging into gear. But it is is wierd when it doesn't seem to respond, as this car usually jumps when you step on the go pedal.
If you found out something, let us know. Thanks, Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)