Bluetooth/HandsFree not working on my 05 TL
 

I have been searching this forum for Bluetooth/HandsFree link problems but I keep getting a error message. My 05 TL Bluetooth has stopped working and will no longer connect to any phone. The dealer told me the HandsFree Link unit is bad and that it will drain my battery. It has been about 5 months and the battery is still fine so could it be another problem? The dealer tried to get a phone to connect but they failed also and gave me a price of $450 to replace the unit. If anyone can point me to a post or thread about this I would appreciate it. Thanks.