https://www.cnet.com/roadshow/news/porsche-will-unveil-the-new-2018-cayenne-on-august-29/ >It's hard to believe that the Porsche Cayenne has been on sale long enough for a third generation, but time marches ever forward whether we want it to or not. >Porsche will debut the 2018 Cayenne on August 29 in Stuttgart, Germany. Those of us who don't feel like dropping coin on airfare, myself included, will be able to watch the debut via a livestream on Porsche's website. The whole shebang kicks off at 9 p.m. Central European Summer Time, or 3 p.m. Eastern.