A VW Passat without an estate version is like a “Currywurst” sausage in the Wolfsburg factory canteen without curry ketchup. Nobody knows that better than Volkswagen. That’s why they are have added an estate with tailgate to that modern equivalent of the Passat, the ID.7. It bows in a good year after it was unveiled. This car competes for would-be load-lugging customers with the BMW i5 Touring and the upcoming Audi A6 E-tron. It will be available for all the three saloon versions. Another obvious rival is the slope-backed Tesla 3, although that is not an estate but a five-door hatchback. With …