Default Handsfree Bluetooth Issues

For all intents and purpose the BT integration with my car is the same as it was with my Motorola Qs. But I used to be able to toggle off the system and to the handset using a menu item on the device. Is there a way to do this on the Imagio? (every Blackberry, iPhone and Q I have paired allows this)

Also, hanging up the phone using any of the cars functions takes almost 20 seconds. Any suggestions?