651 589 00 40 00 Counterholder - WS03.00-P-0114B

FG 01/03/05/07/18/25/27/Set B 

ENGINE 651 

Use: 

For loosening and tightening the mounting bolts on the vibration damper.

The counterholder can also be used to turn the engine.

Fig 1: Identifying Counterholder (651 589 00 40 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.