Hi Klaus,
Basically it looks like F0 : normal directional dependent white light, changes with direction. F1 : red lights on the back of the loco (short nose end). F2 : red lights on front of loco (long nose end). F3 : white lights on both ends (for shunting). So if you have wagons on the short nose end, you need F0 pulling and F2 pushing,. If you have wagons on the long nose end you need F0 pulling and F1 pushing. So you must be fine for Wendezug operation.
Cheers
Phil