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 27/Set B
TRANSMISSION 722.9
Use:
Support plate for prying the transmission housing off the gear set (in conjunction with the valve lifter W 442 589 00 31 00).
Fig 1: Identifying Support Plate (722 589 00 31 00)