Hi,
I have a 1991 190E 2.3. The car runs great and the tranny shifts perfectly (crisp and no slips). I changed the tranny oil and filter recently and it now has a rough engagement when shifting from reverse to drive. It shifts into reverse and drive with no problems. It only does it when I shift into reverse, back up (i.e. from a parking spot) and then shift into drive to go forward. It will slam into first when I step on the accelerator. It works perfectly otherwise....any ideas?
Thanks

So, it doesn't go into gear until you give it gas? Please clarify. Shift linkage?

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1989 300E 144K

The vacuum diaphragm on the drivers side front is used to control the hardness of shifts. If the hose is off, or there is otherwise a vacuum leak, you can get "slamming".

Double check the fluid level, while it's hot and on level ground. Too high or low fluid level will cause a delay in shift engagement.. If the level is too high, the air from the frothing, or too low, the sucking of air for a bit causing a delay in engagement.

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2000 c280 Sport (looks like an upgrade, feels like a downgrade)
1991 190e 2.3 (sold)