That's good to hear... I'm working up the nerve to replace it if I have to. :|
I read the instructions about using a "banjo bolt" for the pressure test. Did you use a banjo bolt or just a normal fitting? If a fitting, do you remember the thread size? I don't want to spend more time than I need under the car... And any other advice would be helpful.
When I checked my transmission fluid and it was low and no leak, my first thought was to check the VM. When I disconnected the vacuum line near the intake, I saw trans. fluid in the line. I knew then it was the VM. When I put my mighty vac on the line it didn't hold vacuum so I replaced it.
Now here's the hard part. I had to lower the exhaust system and lower the transmission to have enough room/space to remove and install the VM. I got this information from a MB mechanic on one of the forums. I didn't do any pressure testing on the new VM, I just installed the new one, took it for a drive and was amazed at how smoothly the transmission shifted. No more hard shifts after engine warm up.
If you decide to replace the VM yourself, it would be a good idea to inspect the shifter bushings while you have access to the linkage.