Vlingo is adding hands free features with each release. Version 3.0 is the first to support a variety of Bluetooth headsets. However, Vlingo does not yet support other types of Bluetooth devices such as car-mounted systems.
To prevent Vlingo from trying to communicate with your car's built-in Bluetooth system, turn off Bluetooth support in Vlingo Options.
To use Vlingo with your Bluetooth headset, continue to press the side key rather than the button on the headset.