I have just upgraded to RNS510 Version D SW 3890 in MY10 Passat. All is well except my right hand side steering wheel buttons are not working - volume and mute are working but not track up and down.

I have tried checking and unchecking Bit0 - short press steering wheel controls but it didnt make any difference (I reset the unit after each change)

I also tried changing Bit7 - the communication instrument cluster via BAP, although this had no effect on the buttons but did bring the navigation directions onto the MFD.

I have searched but found only the above recommendations. Any help is appreciated as this is frustrating me, thanks.