Hi All,
Today I found out how to get into the head unit service menu.
1. Turn ignition to on
2. Press and hold Audio on
3. Turn headlights on four times, once you have done this the service men comes up.
4. To exit turn ignition off.
https://imghostr.net/image/fRtBs
https://imghostr.net/image/fRaRB
https://imghostr.net/image/fRBQL