Sales of the Porsche Cayenne slid in 2005, but nothing brings people back to the dealership like new blood, especially if that new blood is a genetic speed freak from the Stuttgart design lab. Of course, not everybody is going to slap $111,600 down for the top-of-the-line Turbo S, but the showroom traffic it generates is invaluable.

In terms of safety equipment, the 2006 Porsche Cayenne Turbo S features six airbags: two front airbags and two thorax airbags for the driver and passenger, and two side-curtain airbags that stretch along both sides of the roof trim panel. This marks the first time Porsche has installed side-curtain airbags on any vehicle. They’re designed to inflate downward to protect passengers in the front and rear in the event of a side impact or rollover.

In addition to the convenience features you’d expect at this price point, the 2006 Porsche Cayenne Turbo S comes with a full complement of luxury appointments, including bi-xenon headlights, a DVD-based navigation system, a Bose 14-speaker surround-sound audio system, and 12-way adjustable, heated seats with memory. Your significant investment also gets you an air suspension with Porsche Active Suspension Management (PASM), which automatically adjusts the suspension dampers depending on road conditions and driving style. There’s no charge for the 20-inch wheels or metallic paint, including the Turbo S-exclusive Marine Blue Metallic. Strangely, the base model does not include front and rear floor mats ($130). We would speak sternly to your salesperson about getting these “thrown in.”

The 2006 Porsche Cayenne Turbo S model’s customer order guide is more confusing than the U.S. tax code and, at 33 pages, is a substantial document. It would take the IBM “Blue Gene” supercomputer to figure out which packages conflict with which individual options: Do you need to add the leather trim option for the defroster and mirror attachment ($1,480) if you have already checked off the interior leather package ($2,390)? Yes, you do. In fact, while you’re at it you might want to consider the leather covered seat bases ($2,430) and the leather-wrapped steering wheel column ($830). Plus, why not cover all the interior air vents in cowhide too ($2,160)? By our calculations, you can add in excess of $60,000 worth of options to the already astronomical base price. It seems a tad excessive.

There are a few options we can see merit in, including the rear-view camera with park assist ($1,680), four-zone climate control ($1,690), and the panoramic moonroof ($3,900). Other options are intriguing, such as a system that preheats or ventilates the cabin according to your timer settings ($1,570) and the Guards Red instrument dials ($1,200) would be cool if not preposterously expensive. What’s that, 25 cents worth of red paint? It is a pain turning an ignition key so we might spring for the keyless entry and ignition system, called Porsche Entry and Drive ($995). The Off-road Technical Package with hydraulically disconnecting front and rear stabilizer bars, electronically controlled rear axle locking differential, rocker panel and skid plate protection, headlamp washer system, second tow lug, and additional protection for the fuel tank and rear axle ($4,290) sounds awesome, but we really can’t see taking this vehicle into any serious off-roading situations. Other options leave us cold. The cost of satellite radio exceeds the industry norm ($995) and putting the Cayenne logo on the center armrest is like paying to carry a sandwich board for a deli you like ($415). But, hey, it’s only money.