BenzWorld Senior Member
Date registered: Dec 2008
Vehicle: 1984 300D 375,000 miles 1996 e300d 266,000 miles 1983 300SD 174,000 miles Ascot Grey
Location: Savannah GA
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both of my w123's have had sunroof leaks, and both were handled by cleaning the drains. As a matter of fact, i don't have side seals in one, nor front seal in the other right now (temporarily). It's a little noisy from wind, but the rain goes right through. I mean heavy, coastal rain, and not a drop of leakage. Heavy weedeater line works great. Just push it forward into the drain, twisting, then wait for it to come out of the door jamb. Some water flowing through will help. the rears are harder to find. Also, a single strand of household 12 gauge wire works great, I run it through with a 25 caliber pistol bore brush attached to really clean the tubes. very satisfying!
One tip for guys who are putting off seal replacement..... the side felts will break down, and the little chunks of felt will do a very effective job of clogging the drains. you're better off taking them out if you don't plan to replace them.
1984 300d 363,000 Miles
1996 e300d 242,000 Miles
1983 300sd 168,000 Miles Ascot Grey!
1990 Dodge D250 5.9 Cummins 1st Generation