61 31 011 Removing And Installing/Replacing Volute Spring Cassette
WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
Remove and install fixture for steering column stalk.
Unlock catches (1) and remove volute spring cassette (2) towards top.
Installation:
Seat volute spring cassette exactly on plug connections (1), guide (2) and mounts (3).