Hey there Palangi
Im in Australia and am doing up a w1123 wagon 1982 280te
The seats that i have put in are recaro's from a w126 coupe
they match up on the bolt pattern perfectly ,Then I made up switch gear for the electrics (They are fully electric and adjustable)
Got loom and switches from wrecker and made my own console looks great and all works well.
If you get seats from w126 they should fit also and be a little bit more updated also.
If you want pics please post and will send to you.
Also from 1982 much parts were interchangeable from w123 to w126 (Well thats the case here I found) speedo steering wheels seats etc etc