If you don't already have trailer wiring for your 2015 Porsche Macan S, you can use the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT.
This wiring harness will not require you to cut or splice into your factory wiring, but will just simply plug in line with your harness, and provide your vehicle with a 4-pole trailer connector.
Finally, you're going to need a ball mount. What you'll want to do is measure the rise and drop... view full answer...
It is not uncommon for a 4-way like the # 119250KIT to be stored in the rear hatch and hang down over the top of the rear bumper. Although it may not be not ideal, sometimes it is necessary and the best option for installation.
It looks like we did an installation on a 2017 Porsche Cayenne where we were able to feed the 4-way down to stick out underneath the rear bumper. Your 2017 Porsche Macan is not exactly the same, but that is likely that you can do the same. I recommend checking... view full answer...