For most of those rust holes I would pop-rivet patch it. Thats non-structural area. I did a similar repair on my 300D a while ago.
http://www.peachparts.com/shopforum/diesel-discussion/326451-300d-2-5-rust-repair-some-areas-watch-out.html

I also have some more extensive welding work on my 300SD's..
http://www.peachparts.com/shopforum/body-repair-restoration/288453-300sd-rust-restoration-project.html

http://www.peachparts.com/shopforum/body-repair-restoration/304380-300sd-rust-restoration-project-2-a.html

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k