Parks and I have seen the odd 107SL/SLC that really took a pounding from the eternal foe - rust.
One car, in particular, an Astral Silver SLC had practically no panel left below the rear screen - from side to side ! The attached scanned photos illustrate what can be done to fix most of the rust- at least, what you can see. It is a 1973 Signal Red 350SL. Just as an aside, that very same owner 's 450SEL looked at by bb was for sale several months ago and last I heard it was in Canberra with...