A:Answer I suspect that the car you speak of has a Bluetooth system that links to a source, such as a phone or tablet. The Bose Soundlink unit also links to a source, such as a phone or tablet. Most source devices, such as phones and tablets, only link to a single Bluetooth system, such as a car, headphones, and the Bose Soundlink unit. These devices do not connect to each other. To use the Bose Soundlink unit in your car, you would need to unpair your phone or tablet from the car Bluetooth, and then pair the phone or tablet to the Bose Soundlink.