WARNING: This page is about a different car, the 2009 Mercedes-Benz E350 and 2008 Mercedes-Benz E350. However, it is still accessible from the selected car via links, so may be relevant.
FG 27/Set C
TRANSMISSION 722.6/9
Use:
Assembly device for snap ring on spring cup of B1, B2, K1, K2 and K3.