Corrected entry: After the father had gone to the west he had been writing to his family for three years but never got a response because the mother intercepted all the letters. It remains a mystery how she had been able to do that since he had been writing to their home address - the mother has a full-time job and comes home in the evening. The kids come home after school. Of course they would check the letterbox, at least from time to time. Given the load of letters the father had written the odds are too high they would have come across one of them.
Corrected entry: In the film, some people are watching the World Cup semifinal match between Germany and England. Outside, it's daylight. On the TV screen, it's night. Since the scene takes place in Germany and Italy (where the World Cup took place) are in the same time zone, it's not possible to have day in one place and night in the other.
Corrected entry: When the family are driving to the Datscha, Alex is in the back seat of the Trabant, and his blindfolded mother next to the driver in the front. First out of the car is Alex, to help his mother. However the driver and the mother are still blocking the only 2 doors of the car, which begs the quesion: how did Alex get out? (01:26:20)
Corrected entry: Despite what the film portrays, it was not completely impossible to exchange East German marks for West German ones after the July 1990 deadline. Having a mother in a coma would undoubtedly have been an acceptable reason to exchange money a few days or weeks later.