For enhanced safety, the front and rear seat shoulder belts of the Mercedes AMG 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 Hyundai Elantra N doesn’t offer pretensioners for its rear seat belts.
The AMG 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 Elantra N doesn’t offer pre-crash pretensioners.
The Mercedes AMG CLA 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 Elantra N doesn’t offer knee airbags.
The AMG CLA’s standard pretensioning seatbelts also sense rear collisions and remove slack from the seatbelts to help protect the occupants from whiplash and other injuries. The Elantra N doesn’t offer a whiplash protection system.
The AMG CLA offers an optional Post Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Elantra N 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.
The AMG CLA has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Elantra N doesn’t offer all-wheel drive.
The AMG CLA offers an optional Surround View System to allow the driver to see objects all around the vehicle on a screen. The Elantra N only offers a rear monitor and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the front or sides.
Both the AMG CLA and the Elantra N have standard driver and passenger frontal airbags, front side-impact 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 and available lane departure warning systems.
The Mercedes AMG CLA weighs 407 to 607 pounds more than the Hyundai Elantra N. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

