Right, from reading different articles online, i think he might have bluetooth.
get him to take the cradle off and it should see a few metal contacts when this is removed.
now start the car and press TEL, it should say search for telephone or something similar .. try this
sorry, there is no cradle with the car but the plate is there with the contacts showing. Looks like you can clip any cradle in to match a particular phone you have. I'm sure blurtooth is not highlighted in the slection menu. I'm not sure now or its there but when you try to select it it says its not availale or something