Apparently it was the previous ADV that could have two sets of wheels coded to the bike.
The RDC warning can't be turned off. One of my friends runs a Bike Tour company and has 10 BMW's, he complained to BMW that when using the bikes off-road with reduced tyre pressure the RDC warning can't be switched off, BMW confirmed this, so he now puts PVC tape over the warning lights when off-roading in Morocco.