Audi’s Q4 E-Tron has only been on sale since the 2022 model year, but the electric compact crossover is already receiving some key updates. For the 2024 model year, the previous 40 and 50 grades have been replaced by a single 55 model. The new grade brings more power, but also a higher starting price. The 2024 Q4 55 E-Tron is priced from $56,395…