Do I have Sat Nav ?

[UK*X5]

Hi all, I have purchased a used 2001 X5 3.0d Sport (UK spec) with Comms Kit .
Its a great car but I cant get the Sat Nav to work ?

On the display menu it shows info for the phone,tv,heaters and code which all works fine but it does not show any info for the Sat Nav hence I cant even turn it on.

In the rear it is fitted with what looks like the Mk3 CD disc unit, it looks and sounds like its running fine as I can hear the disc spinning inside.

The dealer I bought the car from is not bothered so it looks like its upto me to sort out.

Can anyone please help this puzzled new member

Thanks