Hi ,
first of all have a good look Inside the left side of the trunk (where is the DVD ) normally the bluettoth module is all the way down (like the picture ).
if you cant find the Bluetooth module then look for any hidden connector near the area (normally a 4cm violet connector ) .
if you havn't find anything i suggest that you use an aftermarket blutooth like Parrot , coz it's very hard to retrofit the original one .
https://www.google.com/url?sa=i&rct=...41881077483221