Unless you have one of the Audi OEM phone interfaces you have to code 1 - no telephone. This is true even if you have a (non Audi) BT phone kit.
Although your Allroad has some devices on the CAN bus, for VAG-COM it's a non-CAN car because it doesn't have a CAN gateway. Only the A3 8P, A4 B7, A6 C6 and A8 D3 are CAN cars for VAG-COM. These cars require a CAN enabled VAG-COM cable to connect to certain devices. In any case, the RNS-E is not a CAN device, it gets ocnfigure via k-line.
Although your Allroad has some devices on the CAN bus, for VAG-COM it's a non-CAN car because it doesn't have a CAN gateway. Only the A3 8P, A4 B7, A6 C6 and A8 D3 are CAN cars for VAG-COM. These cars require a CAN enabled VAG-COM cable to connect to certain devices. In any case, the RNS-E is not a CAN device, it gets ocnfigure via k-line.