Steps 10 to 14 talk about the procedure of installation - if you go to the discuss this DIY here bit you end up at the original thread

http://www.peachparts.com/shopforum/body-repair-restoration/238275-rear-windshield-seal-w116-123-126-a-2.html

And you'll see that at the end of the thread post 16 there's even a handy drawing of the trim and some more advice.

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!