E38 Up To 09/98:

Disconnect plug connection.

Fig 1: Disconnecting Plug Connection

Depress brake pedal as far as possible, using pedal support if necessary.

Fig 2: Depressing Brake Pedal

1. Pull tappet and sleeve forward completely.
   Fig 3: Pulling Tappet And Sleeve

   
2. Press together clips and pull back switch.

Installation: 

Slowly bring brake pedal into initial position.