I have read through this forum that most Mercedes automatic transmissions will let the engine wind up when they are cold. After a few shifts , If the trans functions normal then the trans is probably OK. The "hard shifting" could possibly be a bad driveshaft flexible coupling at the transmission end.
There are problems with the power windows in these cars. It could be first the fuse. One fuse powers Driver window and rear passenger window the other fuse powers passenger front and drivers rear windows.
The next item would be the the switch on the center console. If the passenger side window works try swapping passenger switch for driver switch. If that dosn't work you may have to reomove the door panels for further investigation on motor/regulator.
1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T