Monumental miscasting
The actor Danny Webb, who played Hpt. Haans in some kind of communications/signals room that passed orders back/forth, could have been a very realistic Maj. Otto Remer. Much more than Kretschmann.
actor Danny Webb: www.google.com/search?q=danny+webb&tbm=isch&tbo=u&source=univ&sa=X&ved=0ClcBElkeahUKEwiN58OYpKflAhWLaz4KHXTkBlw&biw=1280&bih=651
Maj. O. Remer: www.google.com/search?q=otto+remer&source=lnms&tbm=isch&sa=X&ved=0CAgQ_AVoAmoVChMlqo-FxlenyAlVghY-Ch3vXglB&biw=1280&bih=651
The actor Webb looks to have had enough acting history to handle the larger amount of dialogue the Remer character had.
May have had to darken his hair, at least to look younger.