2003 E39 & E46 BMWs are PREWIRED for BT, but a BT module is required. Once the optional BT module and pairing button are installed, it is operational. No dealer activaiton is required. BTW, the microphoe is usually installed at the factory and should be in the headliner.I have a 2003 E46 330Ci its Bluetooth prepped and needs activation. Aside from taking it to BMW is there any other way to activate it?