The other issue to watch for is gravel.

The wheel arches are not well designed and the flared painted metal at the outside of the wheel arch will get chipped if you drive on gravel roads or if the salt contains gravel ..... these are old cars and the bodies are just not as well designed to avoid corrosion as a new car.

If you drive an old MB in the winter in true winter territory it WILL rust quite quickly. End of story.