164 589 00 05 00 Pin wrench - WS33.00-P-0170B
FG 33/Set B
MODEL 164.1/8, 166, 204.08/09/28/29/98/99, 212.08/09/28/29, 216, 221.08/09/18/19, 251.0/1
Use:
Retainer wrench for counterholding at joint flange of front axle drive.

Courtesy of MERCEDES-BENZ USA