Coolant Hose Connection Diagram [XXXX]: Notes
WARNING: This page is about a different car, the 2016 Audi A3 and 2015 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Blue = large coolant circuit.
Red = small coolant circuit.
Purple = charge air cooler coolant circuit.
Brown = heating circuit.
The arrows show the coolant flow direction.