I guess when some Germans sat down with an UK version of the German to English dictionary, this is the term they came up with.
Anyway, seems to be a very common problem of the clear plastic film peeling off the trim. If it could all peel off at once, probably wouldn't look so bad. I thought about peeling it off myself, but would probably take an hour per trim piece if not more and I figure my time was worth more than the borderline result.
My car had the gloss black trim, I hear the silver lasts longer (and is more expensive), but my wife insisted to keep it black so black is what I bought below.
I did quite a bit searching of the forum here to find out more about this task but didn't come up with anything concrete other than most people let the dealer do it and whoever does it themselves says its easy. Well, I figure I would take the mystery away, see bottom of my post for pictures.
There really wasn't much to it. I did two doors even though I ordered all 4 at once. I thought I would replace them all at once even though only two had peeled. However, I figure with summer starting here in Phoenix, might as well let the two survivors weather another Africa hot summer before replacement. I bet one or both peels before the end of the year.
First door was tougher, pulling up on the trim was more difficult. You can use a broad flat head or a chisel wrapped in duct tape. Also a plastic spreader for plaster could be used if you can find a stiff one.
Second door was easier. Key is just to pull up hard on the trim at the end of the door closest to the B-Pillar. This is where the only clip is located. There is a plastic plug at one end of each trim piece, that can stay in place for both old and new during removal/installation. Once you get the trim off the clip, the rest of the trim just pulls of the metal tongue inserted into the groove of the trim piece.
Once the old one is removed, clean up underneath and get the new one ready to install. Start with the trim end opposite of the clip location on the door, snug it up firmly and start the groove on the metal tounge protruding from top of door. Just keep pressing it and move towards the clip. Make sure the end you started doesn't back off from where you snug up it up against the window frame.
Note, while you have trim off, its a great time to polish up the black section of the B Pillars. Mine where looking somewhat faded. However, this seems to be actual black paint where many other cars use vinyl decals. I started with polishing compound and finished up with wax and they are nice black and shiny again. I tried wax only and they came out nicer with the two step process. Just dont get carried away with the polishing compound.
Including the time I spent polishing up the B-Pillars, it was about an hour job for two pieces.
Best price I could find online was at Mercedes Parts - Get Mercedes Parts at Wholesale Prices
However, finding these parts online wasn't the easiest, some places seem to call out the code with an A at the beginning. The goofy name doesn't help either.
Stock Code: 1646904780
Stock Code: 1646904880
Stock Code: 1646904680
Stock Code: 1646904580
Back side of trim, note groove in middle:
Top of window opening: