210 589 00 16 00 Connection piece - WS22.00-P-0005B
FG 22/Set B
Use:
14 x 18 mm connection piece to loosen and tighten the mounting screw for the engine mount to the engine support (along with a four-point drive 210 589 01 16 00)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.