I'm having the same problem with the front driver side jack hole. Except judging from your pictures, mine is way worse.
There's basically nothing left of the hole where the jack pad screwed in except a thin, spring-like coil. And there's not much left around the jack hole either.
I'm have no experience with body work, so my question is: is this fixable? Should I just cut away all the rust and not plan on jacking the car up with the MB jack on that side?
Again, it's basically hollow up where the jack pad was and the jack hole part looks like it would break off with one tap of a hammer. Boo.