When driving the BR 423, I have noticed that the 'FL' or the 'FR' button directly opens the doors. However, in real life, there's this other button above it to directly open the doors ('ZL'/'ZR' - with 'Z' standing for "Zentralöffnen" - Opening the doors centrally) To add more realism to the BR 423, I would suggest that the button 'FL'/'FR' should only add the door clearance and the buttons above those two buttons should be used for directly opening all doors, unlike in the current game, where the door clearance buttons directly open all doors.
For context: These two buttons below do open all doors in real life, the buttons below them only add the door clearance to the respective side
