Couple Problemes – few questions

Hello. I got convinced by a customer to repair his G model. The box is ~8, 9 years old, has run 150,000 and all non-rusty body parts are made of plastic… All that is made of sheet metal is rusty. Well, that’s supposed to weld, sandblast & paint. He has written me 3 little things on the paper… – Window lifters don’t go (have I already broken apart, since the interior data bus (Can C) collapsed. – Engine makes funny noises (I) njektoren leaks, I have already milled and finished) – Disc wiper bearing in front right, rotates through sheet metal. I have now looked at the latter point and, uh, that’s fixed. Am I right in the assumption that the steel shaft is in an alubus? The shaft is steel, does it run in aluminum or is there anything else between? I would have to know that in order to make this complete again. MB wanted to pick out the amaturary board and renew the bearing, 3,000+€… glove compartment, etc. I did not have any problem. And I didn’t want to expand everything, you can certainly get it all over again… I really only know this stuff from old Opels, 190SLs, etc. in out, but in fixed rusted? What they don’t build all this today at MB…