*bump*

My 1994 C280 has just started to do this exact same thing. The idle surges, or pulses, between about 600rpm and 900rpm as I come to a stop. It only happens when the car is in drive. When I start the car and drive away, it will not exhibit the problem the first two or three times I come to a stop. Then it will surge for for three or four stops, then the idle becomes smooth again. There are no driveability problems at any other point in the RPM range and it does not happen in park.

Any ideas?

Jonathan