I have been looking at the door seals on my 300D. They are pretty good, perhaps a little dry around the corners. Is there something that can be used to preserve and perhaps even revitalize? Or should I just plan to replace them.

I have heard replacement seals never are quite as good as the originals.

Thanks,
William

Or Vinylex.

[All this kinda stuff (Rubber Compounds,Vinyl, Etc.)"Outgases" the semi-liquid VOC components over time,
All you can do is try to slow down the eventual disintegration.]

[The Sun is our Savior...93 Million Mile Away...
BUT,
the UV destroys EVERYTHING it touches.]

The Original O.E. REPLACEMENT seals from Mercedes were "Top Drawer",who knows WTF they've outsourced and try to sell you now(?)

__________________
'84 300SD sold
124.128

I too have had good success with Aerospace 303. It isn't too greasy or glossy like other products when used correctly. Keeps all plastics and rubber or vinyl trim looking fresh.

__________________
1989 300CE

Another vote for 303 aerospace protectant