Im not an expert but it could be the vacuum modulator on your trans. I adjusted mine last week and now my shift points are soft but immediate. The modulator can also be checked with a vacuum pump to see if it holds a vacuum or not. do a search on the "vacuum modulator" you will find adjusting info there. However, It could also be that you are due for a trans fluid and filter change.
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine
06 GT i-Drive7 1.0 Mountain Bike (with GPS!
PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320