I have a 2006 Porsche cayenne s I'm trying to replace the navigation unit because screen is broken I found a used 2010 Porsche cayenne navigation unit for sale on eBay for a good price my question is will the 2010 unit work on my 2006. They are slightly different as far as looks go but it appears the interior of both cars are similar and it looks like it will fit my car but will it work on my car. Thanks I would have called the dealer but they are closed in I want to purchase it ASAP before somebody else buys it. Marie