Over 200 people are killed each year when backed over by motor vehicles. The ES offers optional Auto Braking that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The CLA doesn’t offer automatic braking for stationary objects directly to the rear.
The ES’ standard lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. A lane departure warning system costs extra on the CLA.
The Lexus ES’ rear backup camera has a standard washer for maintaining a clear view under various conditions. In contrast, the Mercedes CLA does not offer a rear camera washer, meaning its effectiveness relies on manual cleaning by the user when necessary.
Both the ES and the CLA have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front wheel drive, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, blind spot warning systems, rearview cameras, rear cross-path warning, available all wheel drive, around view monitors and driver alert monitors.
The Lexus ES weighs 419 to 1356 pounds more than the Mercedes CLA. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

