443 839 821 (443839821) - door mechanism retention clip that is no longer available from Audi.

This clip is used in multiple areas in the door open mechanism on the 1991 Audi 200 20v - and probably a lot of similar vintage Audis.

These secure the metal linkage of the exterior door handle to the door lock. On my car, we had a string of cold weather and both exterior front doors open mechanisms broke in the same way on the same day. I was able to get them back in action using these printed clips in PETG.