166 589 00 63 00 Double connection - WS18.00-P-0020B

FG 18/Set B 

ENGINES 112, 113, 157, 166, 266, 272, 273, 275, 276, 278, 651, 668 

ENGINES 155 in MODEL 199 

Use: 

Double connection M12x1.5 / M12x1.5 mm for connecting testing unit 103 589 00 21 00 for oil pressure test.

M112/113 at end cover of timing case

M166 at bolted connection of chain tensioner

Fig 1: Identifying Double Connection (166 589 00 63 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.