602 589 01 40 00 Retainer device - WS05.00-P-0168C

FG 05/Set C 

ENGINE 601, 602, 603, 606, 611.981 /987, 612.981, 647.981 

Use: 

Retaining device for timing chain on chain sprocket for pulling timing chain into engine (retaining device prevents timing chain from jumping on chain sprocket).

Fig 1: Pulling Timing Chain Into Engine

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Retainer Device (602 589 01 40 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.