I have owned my '70 280SL for 10 years, and although she still looked decent I kindof mistreated her in my youth (left outside, no garage) and so lately alot of rust developed below carpets and inside wheelwells. Here is a good tip: replace leaky windshield gaskets BEFORE the floorpans all rust out! My previous car, 65 Mustang convertible, had similar bad rust issues (probably all east coast convertibles do).
Well the 280SL is now back from extensive surgery. My mechanic took alot of photos, the film is still being printed so I will post some pics later.
All exterior paint was stipped off, 1 new fender and headlamp bucket, L/R front and L/R center floorpans were replaced, new rocker panels, numerous random brackets/braces were also replaced, new rear outer tail panel. All metal pieces came from K&K Mfg and generally these were very high quality: many were OEM, some are repro with original thickness and stampings. Custom fabricated patch pieces were used in a few places. The bill: about $14,000 (incl fresh coat of 291H olive green paint).
I had already rechromed the bumpers and such a few years ago so all brightwork looks pretty good, not mint but this is no museum piece. I think the chroming ran about $1500 (TriCity in North Carolina), not alot since very few pieces needed to be sent out.
Now I am starting to install the new interior (retrim dash, door panels, new wood, horsehair cushions, seat covers, carpets, canvas top, etc). which all cost me another $3000 for materials.
Questions about the front fender area. The dirt shields were replaced, with new rubber seals against the fender side. However there still seems to be some largish gaps here which could allow water entry: at top inside fender, also a 3/4" stamped hole directly in middle of the dirt shield! Looks like there is a dead air space between the dirt shield and the front floor panel, but that water can easily splash up from the tire. Should I silicon caulk the shield to the fender? What about the big hole, why is this needed? Is there supposed to be a rubber plug?
More to come, I plan to document (w pics) my seat cover replacement.