I have the 05CTT.
When I got it, the hitch already installed (OEM), as well as wiring harness. Looks like the hitch was never used (no scratches at all and connector seems never used either).
The other day got to look into it a bit more.
Unscrewed the little plate covering the wiring connector on the car.... and saw what I show in PIC 1.

So here are my questions:
1. Does the car come with harness that already has ability for brake control?
2. Is there anything else I would have to buy to gain the brake control capability if I needed to have it, with this harness/setup?
3. If I only wanted to use the hitch to tow trailer with straight 4 connector, do I still need to buy a kit that used brake control, or just any kit that plugs into this connector in pic, that translates into 4 straight connector?


PIC 2 shows what I just purchased. It is a connector that is supposed to plug into the 7 blade connector I exposed, and on the other side - PIC 3 - has a 7 blad connection (assuming to trailer which includes brake control, lighting, etc), as well as a connection to a 4 straight connector for a trailer with this connection.
4. Will that setup work on my car? Do not want to screw anything up here...the package does not have Porsche cayenne listed at all, but the connectors on the car side seem to line up exactly, as the ones from the harness under the plate that I exposed.

Help will be greatly appreciated here. Thanks in advance.