Is it an RCD510 and RCD310 that have DAB... but neither have NAV?
As is my understanding, you need specifically an RCD510DAB or RCD310DAB.
Without having DAB in the model number it will be AM/FM only.
And correct, RCD510 (DAB or not) does not have NAV, I believe youve got to go to the RNS line for that.
If youre looking to buy an RCD510 DAB, I highly recommend turbo_herbie on ebay. The guy has a 100% positive rating over a couple of thousand ratings which to me is a good sign. I recently bought my RCD510 DAB from him, and he even threw in a cheapie DAB antenna just to get me going until I get around to installing the replacement module and running a 3rd cable from the boot.
