Wheel sensors

I am wondering if anyone could enlighten me as to if a 55 plate classic comes with wheel sensors, that the MFD2 and 3 use to show there location on screen, Would I be correct that as the classic does not come with the MFD option when new, that they are not fitted or if they are they need to be activated My MFD2 sometimes looses its position on the map and starts going north when I am going south,Oh as this site was affected in some way I have used malware bites to scan and AGV free both found something and cleared it