Is this the systemOr just bite the bullet and install Apple Car Play / Android auto....(search the forum for more on this option)
Is this the system
You had installed?
Naviplus Apple car play system works pretty well. Only "frozen" once, so it seems pretty stable. My installer thought the instructions were shocking though with wiring instructions and colours not mirroring what he was looking at behind the dash. Sorted when they sent "updated" fitting instructions ! . So if anyone is the North West is thinking of installing a unit then Formby Car Electrics are your guys. http://www.formbycarelectrical.co.uk/Formby_Car_Electrical/Welcome.html