Remove/install rocker pendulum on master brake cylinder - AR42.10-P-0300-02P

Remove pendulum support 

1. Remove spring nut from the trunnion of the master brake cylinder.

   The single-thread nuts must be destroyed to remove the pendulum support (1a) and must therefore always be replaced. 

2. Pull pendulum support with grommet off master brake cylinder and detach from side rail.
3. Inspect grommet for damage, replace if necessary.

   Shown on model 203 

   Fig 1: Identifying Pendulum Support Dimension

   Courtesy of MERCEDES-BENZ USA

Install pendulum support 

4. Fit spring nut.

   To prevent the pendulum support slipping off the pins of the master brake cylinder, the single-thread nuts must be pushed on according to dimension (X).