129 589 00 21 00 126-pin socket box - WS54.00-P-0008B

FG 00/42/54/91/Set B 

MODEL all 

Use: 

126-pin socket box for contacting electrical systems in combination with model-specific test cable sets.

Fig 1: Identifying 126-Pin Socket Box (129 589 00 21 00)

Courtesy of MERCEDES-BENZ USA