I just bought a 2003 S80 T6. I would like to take out the HU-611 Radio/Cass/CD unit and replace it with an HU-801. I've read that this can't be done, yet I have also read from other owners that they have been able to switch them. Is it as simple as having the dealer download different software? Also, does the 801 need additional equipment such as a separate amp? Thanks! Mike "Tug" T

 

i think you had better not to replace them..or you can consult the special dealers