414 589 00 09 00 Socket wrench with counterholder - WS33.00-N-3335B
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 33/Set B
MODELS 414, 168
Use:
Socket wrench with counterholder for tightening the torsion bar support nut on the front axle spring strut using a torque wrench while countering with a 7 mm socket wrench.