Is there a radio module in a 2003 X5 without NAV?

[JonnyC]

Hi all, this is my first post so please be gentle

I have just got a 2003 X5 3.0d Sport

It doesnt have the NAV, but does have screens in the headrests and DVD player in the back above the CD changer

I have a parrot bluetooth car kit I want to install which has connectors the same as in the back of the radio module

so, I removed the radio control panel from the dash but, after searching this site, found that these units have a seperate radio module????

The post i found was directed at X5s with NAV but
I removed the spare tyre and looked next to the battery (removed the black cover) but there is no radio module there....

So now i am completely lost, can anyone please help and point me in the right direction

Thanks in advance

Jon