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 33/35/Set B
MODEL 163, 166, 164, 251
Use:
Square claw-type wrench 3/4" for slotted nut of repair supporting joint on lower transverse control arm of front and rear axle.