using wood and styrofoam to prop the window up?
 

I recall sometime ago someone using a block of wood and styrofoam (maybe a pool noodle) to prop up a window due to a broken window regulator.

was that true or just a joke?

Haven't seen it on a Mercedes but my 1990 Miata's right door window didn't work when I bought it....removing the panel to inspect it I found a 2x4 but no rubber pad. I guess the rubber is only for luxury cars lol.

i've use wood and styrofoam to prop up the left rear window in a sedan...not worth fixing the window...since people are rarely in the back seat...and when they are they want a/c

My 97 E320 parts car came with ice scrapers ( new ones to boot ) wedged in both rear doors. Given they didn't hold the window up too well, I ended up wedging a 1" X 3" piece of carpet between the interior window sweep and the glass. ( carpet side towards the glass ) This can be done without taking anything apart, use a door wedge to make room for the carpet.

The car is stationary so no report on how long friction will hold it up.