123 589 02 10 00 Allen wrench socket - WS00.00-P-0027Z

MODEL ALL 

FG 00 

Use/specification: 

Allen wrench socket with 10 mm joint, 1/2" square drive, 128 mm, e.g. for starter, transmission

Fig 1: Identifying Starter Transmission Drive Extension

Courtesy of MERCEDES-BENZ USA

Fig 2: Allen Wrench Socket (123 589 02 10 00)

Courtesy of MERCEDES-BENZ USA