When the Berlin wall was pulled down by German citizens, a British journalist found some interesting graffiti. It read "Built by Germans, demolished by Oz".
The building site, although set in Germany, was actually in Hertfordshire in Elstree studios.. Despite the series giving the impression that most of it was filmed in Germany only about 4 weeks of establishing shots were done there and everything else, including building the block of flats was done at Elstree Studios. The block was demolished on completion of filming and it is now the Albert Square set of EastEnders (1985)
Although 'Dennis' is ten years older than 'Neville' and takes him under his wing, Tim Healy is in fact a year younger than Kevin Whately.
Pat Roach developed throat cancer before the filming of series three began. Although he would appear in series' three and four, he was undergoing chemotherapy at the same time. In the third series, it's clear that Roach was ill, and some scenes of his had to be changed to accommodate his medical condition. Although he felt fit enough to appear in series four, his family were angry at him because of the physical toll it was taking out on his well-being. Roach was too ill to appear in what would be the last Auf Wiedersehen Pet series ("The Specials") in 2004. He died during filming of that two-hour special. In a touching scene, Dennis reads a letter from Bomber to the rest of the group while they are all dining in a restaurant, where he explains his reasons for not having joined them. The group lift their glasses and drink a toast; "To Bomber!"
Oz's grimy underpants actually belonged to Kevin Whately. He was washing his car with them at the set and producers thought that they would be perfect for Oz.