Here's what I remember from a couple of years ago when I did this.

I ended up making the tool from an old socket. I think it was an inch and a quarter??? Filed down the rim of the socket to fit the slots in the nut. You will need a new nut because the old one cannot be reused. When it was installed by the factory, they punched down the lip to keep it from coming loose. Had to take a punch to remove the piece that was punched down and then was able to remove the nut.

As for the flange it does not require a puller, it slides right off once the nut is removed. I'm assuming by the flange you mean the three armed gizmo that attaches to the flex disc. You'll have to drop the drive shaft to get to flange. Might want to inspect the flex disk(s) while you have the drive shaft off. Like all the rubber parts on the Benz they go bad on these old cars.

JV