I am familiar with our Mk2 (2015), and I believe the tow package is similar on the Mk1.
There is a very big chassis difference with the factory tow package. Do not add a non -Porsche hitch, because it wil nave nothing of substance to attach to.
The factory hitch costs about $550 when factory installed, but the same hitch, if bought and installed later, is about $2500.
The reason is that the entire lower back of the car must be removed to replace the cross-member that's part of the hitch setup. There may also be some reprogramming of an ECU.
Look for one with a factory hitch, or expect to spend $2500 on the real thing.
Also pay attention to the doorpost, that shows "payload." The more trim like pano sunroof, the lower the payload. Your hitch, trailer tongue, gear and occupants need to stay in those limits.
The Cayenne is a great tow vehicle.
Last edited by Searcher; 12-26-2019 at 02:41 AM.