It really is a beautiful beast isn't it? Stunning restoration. I'd love to see this at a show over here, it's been a good 10 years since we've heard a Daimler Benz in these shores.
If you can get your hands on a copy, I'd recommend the inaugural Vintage Aviation Echo (https://www.vaemag.com/preview-volume-i). Not only is it a wonderful publication, but one of the chapters is dedicated to Rote 12's restoration and test flight schedule, written by the pilot you see, renowned moustachioed RAF officer and warbird legend, Flt Lt Charlie Brown.
Fun fact: Both Fenrir and I flew with this gentleman in a Boeing Stearman many many years ago as RAF cadets on warm summer's evening as a reward for marshalling at an airshow. Ahhh memories.