Not really. They're just following Audi and distinguishing between saloons and coupes by a model rather than a variant.
1 series saloon - 2 series coupe
3 series saloon - 4 series coupe
5 series saloon - 6 series coupe
X3 small SUV - X4 small SAV cross-over thingy
X5 large SUV - X6 large SAV cross-over thingy
"Sleeper 335D xDrive M Sport" Glacier Silver / Black
ZMS | ZNP | ZVI | 2VF | 2VL | 3AG | 494 | 6NS | 8TH