JenTay, change fluid and filter and while you are at it install a new K1 kit. You can get this from the MB dealership. Your transmission is flaring (the RPM jump gives it away). The kit I believe is somewhere around $10 and can be replaced with the trans. in the car. Do a search on K1 here and you should get the info. you need.
Also, get the part # for the kit. My MB parts guy looked at me like I was nuts when I ordered it. Had to give them a parts #. He said he had never ordered one of these in all the years he had been there (over 30). Makes you wonder how many transmissions in this town have been replaced needlessly!