I think it's a great idea. I can especially see the appeal in having the solar-powered AC keep the interior cool while the car is parked. Imagine leaving your car in the sun on a hot summer day and getting in after a few hours and it's still cool inside. I think every car should have this option.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL