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For enhanced safety, the front and rear seat shoulder belts of the Mercedes CLA 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 4 Series Gran Coupe doesn’t offer pretensioners for its rear seat belts.
The CLA’s optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The 4 Series Gran Coupe doesn’t offer pre-crash pretensioners.
Both the CLA and 4 Series Gran Coupe have rear cross-traffic warning, but the CLA has Active Brake Assist (automatically applies the brakes) to better prevent a collision when backing near traffic. The 4 Series Gran Coupe’s Cross Traffic Warning doesn’t automatically brake.
Both the CLA and the 4 Series Gran Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, four-wheel antilock brakes, 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, available all wheel drive, lane departure warning systems and around view monitors.