The ACC is already installed in all the cars, all it needs is switching on. There are plenty of places on the internet that can do this for a fraction of what BMW charge.
Any links @Elliot, as I might look into this?
I have read that any “unauthorised” software upgrades are switched off at Service time though
2024 - BMW i4 Grand Coupe eDrive 35 Sport
2020 - Volvo XC40 T4 Inscription
2017 - Audi Q3 TFSi Sport S-Tronic