My car needed a new lifter motor and I kept the window up the entire time.

If you need to lower the window, I suppose you unbolt what you can with it up, then untape it and perhaps have someone else gradually lower it.

There are bolts you can feel, but not see, facing the outward side. The window motor is soldered on, or at least mine was. To completely remove it, you will need to melt the solder. The motor raises and lowers the glass, so if you remove it, you should be able to position the glass whereever you wish for best access.

However, you can probably unbolt it entirely and the window can be put down.

Look for broken plastic fittings. I think somewhere in this forum it says that these often disintegrate with time.

Mercedes sells a repair kit for about $5.00.

Good luck. I hope this helps.

__________________
Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)