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 35/Kit C
MODEL 170, 203, 209, 211
Use:
Tooth backlash gauge for setting geartooth backlash on ring and pinion gears.