Unsolved How to get current drive mode of active vehicle?

Dear BeamNG community,

I'm trying to get the current drive mode with the following command in lua:

Code:

controller.getController('driveModes').getCurrentDriveModeKey()

This works great up to the point where I spawn normal traffic through the radial menu.
I then get the drive modes of all spawned vehicles - which are "nil".

Is there any way to get only the drive mode of the vehicle I'm currently driving?

Thanks a lot