PC How Do I Open/close Doors On The Ice3m???

I did the tutorial and it doesn't explain how to open(unlock)/close(lock) the doors for this train. It just says to do it with no indicators on where the switches are. The tab menu to lock/unlock the doors doesn't do anything either. I've googlefued the hell out of this and I can't find anything. Send help! Thanks

 

https://steamcdn-a.akamaihd.net/ste...BR407_ICE3_VelaroD_Manual_EN.pdf?t=1542030104

page 8, a switch between 20 and 21

 

Nothing happens when I turn that switch.

 

Move Reverser to Forward first

EDIT: if U don't like the switch - press Tab to open pop-up menu

 

Yeah that way is quite unusual. I'm sure in real life it feels right. Basically move left for left doors, move right for right doors...but don't hang about on the wrong option too long or you may end up opening the wrong doors/both.