Success! Went with partial cut method just so I would not consider reusing the Rubber. I have to say that was one of the easier things I have done on the car. Did it by myself. I was completely shocked how light the windshield actually was. thought it was going to break my back but did not want to wait for my buddy to come over, ended up pulling out and hoisting it up over my head for the walk to is Temporary Living quarters. I cannot believe the access I have to the dash. I wish I did this DAY 1!
I did this few weeks ago, my procedure was I removed the shiny trim carefully with plastic trim remover pry tool and than ran a plastic hook tool on the inner part of the seal to loosen it up from the inside of the car all the way round, then gently pushed from the top corners and the screen came out, no cutting required.
I would only recommend using original MB seal as it is still available at Mercedes and its not too pricey.
see link below
https://classicparts.mbusa.com/oem-parts/mercedes-benz-windshield-seal-1136710220?c=bD05Jm49Q2F0ZWdvcnkgUGFnZQ%3D%3D(may be you already have this)
Now the tricky part is fitting it back in. You have to remove the wood trims on the dashboard (some may have done this without removing the wooden trims) as the new seal seems thicker/harder because its new and when strung in, the string will struggle to come out where the wood touches the seal from both corners which may damage the wooden trims if they are still in place so probably best to remove them in my opinion.
Also the chrome/aluminium surround needs to fitted to the seal/screen prior to stringing the screen to the body frame.
If you are refitting this yourself use lots of soapy water in a spray bottle or use window cleaner as lubricant as it helps putting things back in to place.
Refit is a 2 mans job.