So I decided to change my bluetooth module from the Low (Basic) to the High unit so I get full phone control. Was a pig of a job, as all the information online that I could find said it was under the passanger or drivers side! So had to pull everything out to find it!
If it helps, in the UK version (RHD), the convienence module is under the passanger seat in a black plastic case, while the bluetooth module is under the drivers seat in a black case.
The seat does need to come out - well unbolted and moved as far back as possible to gain access. Pretty fidley to move the carpet, but fairly easy to actually change the unit.
So I have the old basic one for sale if anyone is interested!