to make vehicle production more environmentally friendly, Mercedes is looking at using screws instead of glue, when assembling headlights with individual components

being able to unscrew one and replace it with a fresh piece makes replacement easier, which avoids junking an entire headlight because of one bad part. 

Mercedes is also looking into simpler assembly processes for other parts. For interior door panels, it hopes to replace ultrasonic welding with thermoplastic rivets that are easy to undo, allowing the door panel to be disassembled and individual materials separated for recycling when a car has reached the end of its lifespan.

Mercedes may also use old tires to make synthetic leather and sound-absorption material, and engine mounts made from recycled airbags, if current experiments pan out.

https://www.thedrive.com/news/mercedes-wants-to-go-back-to-basics-and-use-screws-not-glue