Replacing the cylinder in the Audi door lock 100 C4

To replace the door lock with Audi 100 C4:

1. We're taking off the outer door handle.
2. Insert the key so that the locking plates and springs are not dropped when the cylinder is removed.
3. On the back end of the larva remove the retaining ring.
4. While noting the position of the capture and the elastic element, remove them.
5. Remove the cylinder from the lock.
6. When a new cylinder is installed, WD-40 shall be sprayed.