In the scene where Mrs. Ratcliffe drives the Wartburg through the border fence, you can see in the background a black, red and yellow striped border post. In the film the post is on the East side but in reality these posts were only on the West side, facing West (they had a metal DDR plaque attached) indicating to anyone approaching the East that 'this is where the DDR Republic starts'.
The Rattcliffes supposedly move to the DDR, but in fact all the scenes from East Germany were shot in Hungary - another ex-communist country.