For enhanced safety, the front and rear seat shoulder belts of the Mercedes AMG GLC Coupe 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 X4 M doesn’t offer pretensioners for its rear seat belts.
For enhanced safety, the front seat shoulder belts of the Mercedes AMG GLC Coupe 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 X4 M doesn’t offer height-adjustable seat belts.
Earlier warning of stopped traffic, traffic signals, dangerous road conditions, weather, or accidents, can keep driver's safer and prevent crashes. The AMG GLC Coupe has Car-to-X, a system that seamlessly communicates important warnings to the driver about impending danger, if they're available. The X4 M doesn’t offer a system that can receive automated systems from other vehicles.
Both the AMG GLC Coupe and X4 M have rear cross-traffic warning, but the AMG GLC Coupe has Active Brake Assist (automatically applies the brakes) to better prevent a collision when backing near traffic. The X4 M’s Cross Traffic Warning doesn’t automatically brake.
Both the AMG GLC Coupe and the X4 M have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, blind spot warning systems, rearview cameras, rear cross-path warning, driver alert monitors and available lane departure warning systems.