Custom keyboard configuration (suitable for 3-4 door buses etc)

Door bindings 

Open/close all doors door_all
Open/close first door (or incase of MAN SD buses and some other first door first part) bus_doorfront0
Open/close second door (or incase of MAN SD buses and some other first door second part) bus_doorfront1
Open/close third door bus_doorfront2
Open/close fourth door bus_doorfront3

Custom keyboard configuration

Here you can download Gameburrow's custom keyboard configuration that has ll these keys mapped:
https://nx9934.your-storageshare.de/s/fJoekkGQn7cXbRE

Changes from default:
Shift + Num 0: Open/close all doors
Shift + Num 1 - Num 4: Open close 1 - 4 doors
Shift + Num Enter: Station Brake
K / Shift + K - Kneeling toggle (for some buses just pressing K toggles/untoggles, for some you need to press K to toggle and Shift + K to untoggle, for some this bind doesn't work at all)