Remove/install rear brake cable at wheel carrier - AR42.20-P-0525-03SX

Removal 

1. Press toggle (1a) of brake cable (1) upwards against the spring (2) in the expanding lock (3) using a screwdriver.
2. Pull brake cable (1) out of wheel carrier (4).

   Mounting 

3. Insert brake cable (1) into the wheel carrier (4) until the toggle (1a) latches into the expanding lock (3).
   Fig 1: Identifying Rear Brake Cable At Wheel Carrier Components

   Courtesy of MERCEDES-BENZ USA