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For enhanced safety, the front and rear seat shoulder belts of the Audi RS 7 have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The BMW M3 doesn’t offer pretensioners for the rear seat belts.
The RS 7’s front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The M3 doesn’t offer pre-crash pretensioners.
For enhanced safety, the front and rear seat shoulder belts of the Audi RS 7 are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The BMW M3 doesn’t offer height-adjustable seat belts.
Both the RS 7 and M3 have child safety locks to prevent children from opening the rear doors. The RS 7 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 M3’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 RS 7 has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The M3 doesn’t offer all-wheel drive.
An active infrared night vision system optional on the RS 7 helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera and near-infrared lights to detect heat, the system then displays the image on a monitor in the dashboard. The M3 doesn’t offer a night vision system.