My hand-free link unit stopped work, I thought the part is inside overhead console, I brought whole overhead unit from auction site , but it doesn't work either. do you know where is unit located. Any help is appreciated.

 

Its behind the glove box and to the right in the 2005-2008 (maybe 2012) generation. Literally almost inside the front passenger quarterpanel. You need to carefully take out the glove box to get to the HFL box, and maybe the air filter as well.