Hi guys after some advice please I have a genuine VCDS cable Hex/Can and am trying to access the Navigation module on a Audi A4 B7 to code in AUX functionality. The unit always returns the error "Controller not found" for navigation and radio modules. When testing connectivity before starting K1/K2/CAN all show as OK. I've tested continuity on the Kwire with a multimeter between the RNSE unit and the diagnostic port and this is OK. All other modules work fine its only this one that doesnt. I've used the cable on a Skoda MK2 2008 and could access all modules fine including navigation, same story on a 2009 S4. As far as I know the RNSE is factory fitted, the Kwire is located in B5 in the quadlock as per the wiring diagram on the unit. Not sure what I am doing wrong on this car?? Thanks for reading.