Which MB doesn’t rust? W221, W251, R230, W211?

Now that I have made my experiences with the S210 year 2001 and probably in 1-2 years at the latest will no longer be able to cope with the rust without investing thousands of EURO, I would like to look around for the next star. But from which model or model year is rust no longer a topic? I just hope it IS no longer a topic… What I like? Different. As an affordable combination there would be the E-tonne W211. As a luxury sled a S-Class W221? But also a Van of the R-Class could be interesting. Or as a fun car for dad with grown-up children an SL R230. Does one know what it looks like with the models especially with rust? Greetings from Königs Wusterhausen