@yadkin2002, Philip, I do not believe/not positive the entire window should have to come out to change the door strap, you should have to remove the pin and bolts and may have to turn(manipulate) the old strap to remove from door cavity or possibly have to loosen front window guide/track. Just to add a little to OT post, the video links(not your exact model) but may help in the removal of check strap. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
https://www.youtube.com/watch?v=m3_NggBaOuE
https://www.youtube.com/watch?v=R0U3VNbbqoE
https://mercedessource.com/store/mercedes-door-check-strap-diagnosis-and-replacement-demand-video