Michael,
I suppose you looked at the Technical Manual, the chapter about the glove box:
https://www.sl113.org/wiki/Interior/GloveboxPlease note the rivets go under the upholstery so that you do not see them. PLease also note that there should a be a cardboard (I think) pad that goes on the bottom of the glove box to cover screws as well.
There is a nice idea of a piece of tube to use to hold the spring in place and prevent it from "kinking" described in the Technical Manual. I just also glued some foam to hold this piece of pipe/tube in place as I was afraid it would rattle.
Use the rosette as advised (you will later regret you did not) - all has to fit, you can adjust rosette a bit with a file at its lower edge, it will not be seen. Once you rivet the hinge and fit the door - the curved bar should fit the rosette. Just bear in mind that you need to put the whole glove box together before you insert it under dash. You have to rivet the hinge to glove box to do that. Then fit the rosette, the rubber buffers, the door, then spring.
It is also important to remember that the four screws that hold the door to the hinge have bigger holes in the hinge than in the door. If you losen them, you can move/adjust the door fit to dashboard (be careful not to chip-off paint). You will have 1-2mm of adjustment.
I lengthen the map lamp wire for easier assembly. I routed the ipod jack socket wire through the little duct curved in the box floor for lamp wire - if you are looking into doing aomething like that.
The rubber door buffers are available from Mercedes. It is easier to fit them when the box is out.
The chrome ring nut that holds the lamp switch - I saw pictures when it was under upholstery, not seen. Then I saw the factory picture where it was on top of upholstery, visible.
Mask the dashboard area where glove box goes in with painters tape (do not let the tape sit long on painted areas) or with other materials. Less stress related to scratching anything.