Benz: 1997 C230 , 722.6 transmission. 140k miles, tranny fluid changed at 70K

Issue: Intermittently.. while I am stopped, brake on, and the car is in Drive .. there will be a "lurch".. small nudge from the transmission like it wants to go. The rpms drop slightly...

I've gone to placing the transmission selector in neutral while stopped > and it still displays this nudge behaviour..

Torque converter?... the transmission shifts just fine in normal driving mode.. it just has this problem while stopped at a light/stop sign/heavy stop/go traffic...

ideas???

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Kim Langley
97 C-230
80 911 SC
73 2002Tii