For enhanced safety, the front seat shoulder belts of the Mercedes S-Class 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 Rolls-Royce Phantom doesn’t offer height-adjustable seat belts.
The rear seatbelts optional on the S-Class inflate when a collision is detected, helping to spread crash forces over a much larger area of the body and limiting head and neck movement. This can help prevent spinal and internal injuries. The Phantom doesn’t offer inflatable seatbelts.
Over 200 people are killed each year when backed over by motor vehicles. The S-Class has standard Maneuvering Brake Function that use rear sensors to monitor for objects to the rear and automatically apply the brakes to prevent a collision. The Phantom doesn’t offer backup collision prevention brakes.
The S-Class has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Phantom doesn’t offer all-wheel drive.
Earlier warning of stopped traffic, traffic signals, dangerous road conditions, weather, or accidents, can keep driver's safer and prevent crashes. The S-Class has Car-to-X Communication, a system that seemlesly communicates important warnings to the driver about impending danger, if they're available. The Phantom doesn’t offer a system that can receive automated systems from infrastructure or other vehicles.
Both the S-Class and Phantom have rear cross-traffic warning, but the S-Class has Active Brake Assist (automatically applies the brakes) to better prevent a collision when backing near traffic. The Phantom’s Cross Traffic Warning doesn’t automatically brake.
Both the S-Class and the Phantom have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, lane departure warning systems, blind spot warning systems, around view monitors, rear cross-path warning and driver alert monitors.