221 589 03 09 00 Socket - WS42.00-P-0088B

MODEL 204, 207, 212, 216, 218, 221 

FG 42/Set B 

Use: 

For loosening and tightening brake caliper threaded connection.

Fig 1: Identifying Socket (221 589 03 09 00)

Courtesy of MERCEDES-BENZ USA