613 589 00 40 00 Retaining device - WS05.00-P-0196C

FG 05/Set C 

ENGINE 611, 612, 613, 647, 648 

Use: 

Retaining device for timing chain on chain sprocket for drawing timing chain into the engine

Fig 1: Identifying Retaining Device (613 589 00 40 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.