Mercedes-Benz has demonstrated the crash safety of its new CLA in a demanding real-world-inspired test, bringing two production vehicles together in a high-speed side-impact collision. Both cars were travelling at 56 km/h, creating a combined closing speed of 112 km/h, with the test designed to evaluate occupant protection and the structural integrity of the all-electric CLA.
The test paired an all-electric Mercedes-Benz CLA with a CLA Shooting Brake featuring an electrified combustion engine. Both vehicles weighed more than two tonnes and collided without prior braking, recreating a particularly severe intersection accident.
According to Mercedes-Benz, the results showed that both vehicles maintained their passenger compartment integrity, while the high-voltage battery in the electric CLA remained intact despite the direct side impact.
Side-impact collisions are among the most challenging crash scenarios for vehicle engineers. Unlike frontal crashes, where the front of the car provides a relatively large area to absorb impact energy, the sides offer considerably less space between occupants and the point of impact.
The challenge is even greater for electric vehicles, where the high-voltage battery is typically housed in the vehicle floor. A severe side collision must therefore be managed without compromising either passenger protection or battery integrity.
Mercedes-Benz reported that all eight crash-test dummies, representing four adults and four children, recorded measurements below the relevant biomechanical injury thresholds. Each dummy was equipped with sensors measuring forces and movements across as many as 150 data points.
The results indicate a low risk of serious or life-threatening injuries under the tested conditions, according to the automaker. Both passenger compartments remained intact, and the electric CLA’s high-voltage battery showed no damage.
Mercedes-Benz said the outcome demonstrated how its integrated safety systems, body structures and occupant restraint technologies work together during a severe collision.
Why the 112 km/h Combined-Speed Test Matters
The crash test stands out because it involved two moving production vehicles rather than a stationary barrier or a specialised impact device.
Although each vehicle was travelling at 56 km/h, the combined closing speed was 112 km/h. This figure describes how quickly the distance between the two vehicles closed before impact; it does not mean that either vehicle was travelling at 112 km/h.
Mercedes-Benz said the scenario represents the upper end of speeds associated with real-world intersection collisions identified in its accident research. The test speed also exceeds those typically encountered in city-centre traffic.
The company noted that around a quarter of accidents resulting in personal injury involve side impacts, highlighting the importance of developing vehicles that can protect occupants when a collision cannot be avoided.
No legal requirement or standard safety rating mandates a side-impact test involving two moving production vehicles in this configuration. Mercedes-Benz therefore used the exercise to demonstrate its own approach to real-world crash safety, which it calls “Real-Life Safety.”
The automaker’s driver assistance systems are designed to help prevent collisions or reduce their severity in everyday driving. However, the crash test focuses on what happens when a serious impact occurs despite those preventive measures.
Mercedes-Benz Uses Thousands of Simulations to Develop Vehicle Safety
Mercedes-Benz has been investigating and reconstructing real-world accidents since 1969. The company says its research teams in Germany, China and India have analysed approximately 6,000 accidents, using the findings to improve vehicle structures, restraint systems and internal safety requirements.
Before a new model reaches physical crash testing, it undergoes extensive computer simulations. Mercedes-Benz carries out around 15,000 crash simulations during the development of each new model, with artificial intelligence helping engineers improve the accuracy of their predictions.
The company also conducts approximately 150 physical crash tests per new model, going beyond minimum legal requirements as part of its vehicle safety development process.
This combination of accident research, virtual simulations and physical testing is intended to address a broad range of crash scenarios, including situations that may not be fully represented by standardised regulatory tests.
For electric vehicles such as the CLA, that process must account for additional considerations, particularly the protection of the high-voltage battery and the safety of electrical systems following an impact.
Mercedes-Benz Rescue Intelligence to Launch From 2027
Alongside the crash test, Mercedes-Benz introduced Rescue Intelligence, a system designed to provide emergency services with accident-related vehicle information before they reach the scene.
The rollout is planned to begin gradually in 2027. Once available, the system will establish a direct connection between vehicles involved in accidents and emergency services, allowing rescue teams to access relevant information while travelling to the incident.
Depending on technical availability and the circumstances of the crash, the information may include the number of occupants, airbag and seat-belt status, which doors are open, battery temperature and the condition of the high-voltage system.
Access to these details could help firefighters and rescue personnel assess potential hazards, determine which equipment may be needed and prepare their response before arriving.
For electric vehicles, information about battery temperature and high-voltage system status can be particularly valuable when emergency crews are assessing the risks associated with a damaged vehicle.
The system is intended to improve situational awareness during the critical early stages of a rescue operation, when every second can make a difference.
What the Test Means for the Electric Mercedes-Benz CLA
The latest demonstration highlights two important aspects of electric vehicle safety: protecting occupants during a severe side impact and maintaining the integrity of the high-voltage battery.
The results from this particular test are encouraging, although a single manufacturer-conducted crash test does not replace independent safety assessments or establish how a vehicle will perform in every possible accident.
By combining real-world accident research, extensive simulation work and demanding physical tests, Mercedes-Benz aims to address scenarios that extend beyond conventional crash-test requirements.
With Rescue Intelligence also planned for introduction from 2027, the company is extending its safety strategy beyond the moment of impact to include the emergency response that follows.
For the all-electric CLA, the intact battery and passenger compartments represent the key findings from a particularly severe test designed to demonstrate how the vehicle responds when a collision cannot be avoided.
