No Upgrade needed. The RNS510 will plug and play exactly the same as the stock RCD310. You will receive a GPS arial with the RNS and this needs to be positioned above the unit. In my case it sits on a bit of foam just under the tray on the dash top.
Apart from the GPS arial the installation is exactly the same.
If you are not getting a MF steering wheel then there will be no issues with using either the RCD510 or RNS. They can be fully operated from their buttons and touchscreens.
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