In 2004 the Cayenne came out with a new feature called a Pre-heater (or Parking Heater). This system allows the owner to preset a time when the vehicles independent heating system comes on and heats the interior and defrosts the windshield. This feature was taken off the market because of homologation issues and is now coming back and I would like to understand if people who have the feature have used it and what is your opinion. This feature is very environmental friendly since it heats the vehicle with the "engine-off" and uses 8 times less fuel than remote start, and produces 1% of the emissions of remote start. Your feedback will be appreciated.