This link describes changing the roof cover.
I don't know how accurate it is but it does look very descriptive with pictures.
http://webspace.ringling.edu/~dplassma/str/str.html
Edit 07/12/22: New link https://larryville.net/wp-content/uploa ... ement.html
Z3 Roadster soft top - DIY Replacement
Z3 Roadster soft top - DIY Replacement
Gazza
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe
"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"
Z3 S54 M roadster , BMW Z1, BMW M3 CSL, Z4M Coupe