WARNING: This page is about a different car, the 2009 Mercedes-Benz CLK350 and 2008 Mercedes-Benz CLK350. However, it is still accessible from the selected car via links, so may be relevant.
FG 00
MODEL all
Part
117 589 02 07 01 Insert
FG 00
WS00.00-P-0054-01Z
Use:
Allen/box wrench, 14 x 13 mm, for loosening and tightening oil plug