Connection Diagram - Coolant Hoses: Notes
WARNING: This page is about a different car, the 2018 Audi S6, 2017 Audi S6, and 2016 Audi S6. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Blue = large coolant circuit.
Red = small coolant circuit.
Orange = coolant circuit for ATF cooling.
Brown = heating circuit.
Green = charge air cooling circuit.