Ok, here is "this guy"
In my game its in german, i'll try to translate correctly
The keys are " Einachsiger Autopilot - Modi durchschalten" single axis auto-pilot switch modi
"Einachsiger Autopilot - Kurs nach links anpassen" single axis autopilot - adjust course to the left
"Einachsiger Autopilot - Kurs nach rechts anpassen" single axis autopilot - adjust course to the right
You trim the plane for level flight and switch on the autopilot.
Now you adjust the course until the autopilot - instrument has the moving marking under the center of the 3 fixed vertical markings.
Now let the plane settle.
With minuscule course adjustments you can steer your plane relatively stable.
Your joystick is still active! leave it alone!
Now go to bombardier, do your adjustments and look as far forward as possible.
Do your course adjustments very careful and wait for the plane to settle.
good luck!