Audi has temporarily removed the S4 and S5 models from sale in the UK due to high demand and the need to fulfill existing orders. The models can still be purchased from stock, but they are no longer available on Audi’s website. It is unclear when they will be back on sale. The current A4 and A5 models are set to be replaced next year, and it is uncertain if the S4 and S5 will return before the new models are introduced. However, customers can still order the RS4 Avant, RS5 Coupe, RS5 Sportback, S6, and S7 saloons. Between January and June 2023, Audi sold a total of 198 S4 and S4 Avant models, as well as 178 S5 Coupes and S5 Sportbacks in the UK. It is uncertain if the 2024 models will use the same 3.0-litre V6 diesel engine. Currently, BMW has also axed all diesel variants of the 4 Series. As part of Audi’s new naming strategy, the next-generation A4 will carry the A5 name into production, and an electric equivalent called the A4 E-tron will also be available. The fate of the successor to the current A5 model is unclear. The S4 Avant and S5 were initially launched in 2017 with a 3.0-litre petrol V6 engine and later facelifted in 2019 to include a twin-scroll turbocharged diesel engine option.