Radio Manual

Hi All,
I have a 2002 Range Rover TD6 Vogue. I am trying to manualy tune the radio and use the radio in general. Unfortunately the Owners Manual that came with the car covers the standard radio. Mine is the one with the TV screen / Sat Nav / on baord computer..etc and this manual is comletely useless. Does any one know where I can get or download the correct User Guide or manual for my particular stereo system?
Many Thanks
Jon

It should be quite self explanatory being the LCD screen type

Unfortunately it's not that self explanatory. For instance to auto tune the radio is easy but I cannot get it to manual tune