Finally i get some inspiration yesterday to start my sport seat project. My 318I (euro 2 dr) have normal front seats, and are torn out after 380000+ km use. Since it's my daily driver, i needed another interior, which i got almost free.
Because this is only a daily driver, iam on tight budjet. I managed to locate similar rear seat, so i can sacrifice dirty one to repair cloths for the front seats
This is from what i started from, torn out drivers sport seat

dirty rear seat clothing waiting some washing

After some washingmacine treatment clothes are drying
Front seat cloths drying after washing. I use these only for templates

I ironed the clothes after they dried up. I manged to get rid of all the wrinkles.
Front set frame and all the superlons are for some reason in good shape.

Now i just had to fix my 1938 Singer's (grand mom's old) leather drive belt which is broken, where is the quality, belt only lasted about 70 years :p
Here a chair (from 1937) i restored about 20 years ago with this same Singer
To be continue.