Automatically connect to Bluetooth when in car?

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http://androidforums.com – I don't have Bluetooth in my car and am thinking of buying an aftermarket Viseeo 1000 which I understand I can plug in to the connector originally meant for a phone which will add Bluetooth capability to the entertainment unit and allow me to take calls on the move. My question is can I use Tasker to connect automatically via Bluetooth when in the car? I'm thinking that it would not be a good idea to leave bluetooth on my Galaxy Note permanently as I already have a daily struggle with the battery. So would there be a way to use Tasker to check whether I am in the car and then turn Bluetoot (General)