They somehow end up in Berlin. Manfred was forced into the German army until 1942. They released him to study medicine, but apparently he ended up in a concentration camp at some point, which he supposedly escaped before the war ended (this is all based on his aunt's information given after the war in his file). His mother and he end up in Hamburg by 1946. Manfred at this point says he is studying medicine and his mother is ill from malnutrition.
Based on the file, the information trail seems to end here. Surprisingly, even though Manfred had the best chance to get over based on his background, he does not make it over and others who had a slim chance, got over and were able to make a life for themselves. As far as Manfred's story, it is pretty choppy and some of the facts don't seem to make sense. Hopefully, down the road, I can give you a better understanding of the story and maybe find a family member who might shed some light on his journey.
Manfred's story shows how all the refugees were racing against time and on borrowed luck.