Both the Cayenne Coupe and XT5 have child safety locks to prevent children from opening the rear doors. The Cayenne Coupe has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The XT5’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.
The Porsche Cayenne Coupe has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The XT5 doesn’t offer a front passenger side knee airbag.
The Cayenne Coupe has a standard Multi-collision Brake System, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The XT5 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the Cayenne Coupe. But it costs extra on the XT5.
When descending a steep, off-road slope, the Cayenne Coupe’s standard Porsche Hill Control allows you to creep down safely. The XT5 doesn’t offer Porsche Hill Control.
A passive infrared night vision system optional on the Cayenne Coupe helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The XT5 doesn’t offer a night vision system.
The Cayenne Coupe has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. Only the XT5 Premium Luxury/Sport offers a blind spot warning system.
To help make backing out of a parking space safer, the Cayenne Coupe has standard Rear Cross Traffic Alert and automatically engage the brakes. Only the XT5 Premium Luxury/Sport offers Rear Cross Traffic Alert and the XT5’s Rear Cross Traffic Alert does not include automatic braking.
The Cayenne Coupe’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The XT5 doesn’t offer a driver alert monitor.
Both the Cayenne Coupe and the XT5 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems and rearview cameras.
The Porsche Cayenne Coupe weighs 402 to 1804 pounds more than the Cadillac XT5. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.