602 589 01 40 00 Retainer device - WS05.00-P-0168C
WARNING: This page is about a different car, the 2012 Mercedes-Benz C300, 2011 Mercedes-Benz C300, 2010 Mercedes-Benz C300, 2009 Mercedes-Benz C300, and 2008 Mercedes-Benz C300. However, it is still accessible from the selected car via links, so may be relevant.
FG 05/Set C
ENGINE 601, 602, 603, 606, 611.981 /987, 612.981, 647.981
Use:
Retaining device for timing chain on chain sprocket for pulling timing chain into engine (retaining device prevents timing chain from jumping on chain sprocket).