Automobilwoche reports that the KBA, Germany's motor vehicle regulator, has already revoked the registrations of several Audi and VW cars without the fix in Hamburg and Munich following repeated warnings to the drivers, because the cars were still emitting more NOx than was originally declared.
The fix is mandatory in Germany because the authorities declared it a safety recall, whereas in the UK it was labelled a 'service action’. The KBA told Automobilwoche: "The recall is compulsory. Cars that are not fixed can eventually be taken out of service. Subject to the release date of the updates, the car owner has had about a year and a half. Plenty of time to take part in the recall."
The deregistrations are therefore not completely unexpected. Similar deregistrations are unlikely to happen in the UK because the fix was not declared a safety issue here.