Installation   
3.6 Installation on a desktop pedestal 
  SCALANCE M874, M876 
42  Operating Instructions, 08/2018, C79000-G8976-C331-08 
1.  Disconnect all connected cables. 
2.  Using a screwdriver, pull down the catch on the rear of the device. 
3.  Remove the device from the pedestal. 
Accessories (Page 17)