Thank you for the kind words!
Make sure that you mark the driveshaft halves before you take them apart. This way they will go back together easier and line up correctly.
I don't think the support bearing shown on the right is the correct bearing for a Crossfire. It looks like it's for a different class of Mercedes-Benz.
You're doing great! Just take your time and be safe. I didn't like working on my back either, I kept feeling like the car was going to fall on me! LOL
By the way, when I bought my car I only had 3 metric wrenches because I only had worked on older American muscle cars. Harbor freight is very happy that I bought a Crossfire! LOL