I called my dealer today and they said after several minutes of searching through their books, etc., that there doesn't appear to be an engine block heater available for the 2007 model...so will earlier versions work? Are there 3rd party ones to get (not the $1600 option) or should I just put a heating pad on my engine each night? Getting one of the remote starts seems like a waste of gas as it has to use gas to warm the car...have already had to many frosty mornings and have to sit for 5 minutes to wait for the windshield to clear and my mileage is suffering.