642 589 04 40 00 Tie-down set - WS05.00-P-0257B

FG 05/Set B 

ENGINE 642 

Use: 

Tie-down sets hold the timing chain in mesh with the camshaft sprocket.

Fig 1: Identifying Tie-Down Set (642 589 04 40 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.