WARNING: This page is about a different car, the 2009 Mercedes-Benz E550 and 2008 Mercedes-Benz E550. However, it is still accessible from the selected car via links, so may be relevant.
FG 05/Set C
ENGINE 156, 271, 272, 273
ENGINE 272.979
ENGINE 273.963
Use:
Assembly link for connecting the old oil pump chain with the new oil pump chain while changing an oil pump chain.
Fig 1: Identifying Assembly Link (271 589 02 40 00)