Mercedes-Benz has demonstrated the safety capabilities of its latest CLA by conducting what it describes as the world’s first public high-speed side-impact crash test involving two moving production vehicles. With both cars travelling at 56 km/h, the demanding real-world-inspired test put the passenger compartments, restraint systems and high-voltage battery of the all-electric Mercedes-Benz CLA under considerable pressure.

The test involved a 48-volt mild-hybrid Mercedes-Benz CLA Shooting Brake striking the driver’s side of an all-electric CLA. Both vehicles weighed more than two tonnes, and neither applied the brakes before impact. The result was a severe intersection-style collision designed to replicate one of the most challenging accident scenarios for modern passenger cars.

According to Mercedes-Benz, the passenger compartments of both vehicles remained intact, the crash-test dummies recorded readings below the relevant biomechanical injury thresholds, and the electric CLA’s high-voltage battery remained undamaged.

Mercedes-Benz CLA Crash Test Recreates a Severe Real-World Collision

Side-impact collisions present a particular challenge for automotive engineers. Unlike frontal crashes, where the front of a vehicle provides a relatively large deformation zone to absorb impact energy, the space available between the side of the car and its occupants is considerably more limited.

The challenge becomes even more significant when an electric vehicle is involved. In addition to protecting the occupants, engineers must ensure that the high-voltage battery, typically positioned within the vehicle’s underbody, remains protected during a severe impact.

Mercedes-Benz selected a collision speed of 56 km/h for each vehicle, describing it as being at the upper end of the speed range associated with real-world intersection accidents. The company also noted that the speed exceeds those typically encountered in city-centre traffic.

The decision to use two moving production vehicles rather than a stationary barrier or a conventional impact trolley was intended to provide a more representative demonstration of how the vehicles’ safety systems perform in a demanding collision.

Mercedes-Benz says approximately one-quarter of accidents resulting in personal injury involve side impacts, underlining the importance of developing vehicles capable of managing this type of collision.

CLA Occupant Protection and High-Voltage Battery Safety

The results of the Mercedes-Benz CLA crash test were encouraging. Both vehicles maintained intact passenger compartments, while measurements collected from eight crash-test dummies remained below the applicable biomechanical limits used to assess occupant protection.

The dummies represented four adults and four children, allowing engineers to evaluate the effectiveness of the vehicles’ safety systems across different occupant profiles.

Each dummy featured up to 150 measurement points, providing detailed data about the forces experienced during the collision. According to Mercedes-Benz, the results indicated a low risk of serious or life-threatening injuries for the occupants represented in the test.

The all-electric CLA’s high-voltage battery also remained intact and undamaged despite the direct side impact. This is an important result because battery protection is a central consideration in the development of electric vehicles, particularly in collisions that threaten the structural integrity of the underbody.

Jörg Burzer, Member of the Board of Management of Mercedes-Benz Group AG and Chief Technology Officer responsible for Development and Purchasing, said the test reflected the company’s ambition to develop vehicles with the highest possible safety standards.

Mercedes-Benz’s approach focuses on developing safety systems capable of responding to the types of accidents that occur on public roads, rather than relying exclusively on standardised laboratory scenarios.

Why Mercedes-Benz Went Beyond Standard Crash Tests

The Mercedes-Benz CLA test was not required by legislation or an established vehicle safety rating protocol. Conventional side-impact assessments typically use stationary barriers or specialised impact vehicles under controlled conditions.

Instead, Mercedes-Benz chose to stage a collision between two production vehicles travelling at speed, drawing on accident data collected through its own research programme.

The test forms part of the company’s broader Real-Life Safety philosophy, which aims to incorporate findings from actual road accidents into vehicle development requirements.

“If you want to build the safest vehicles, you need to incorporate insights from real-world accidents into your vehicle development requirements. We call this Real-Life Safety,” explained Paul Dick, Director of Vehicle Safety at Mercedes-Benz AG.

He added that the test involving two CLA models demonstrated how the company translates this philosophy into practical vehicle development.

The distinction is important: while a single crash test cannot establish that a vehicle is safer than every competitor or guarantee the same outcome in every real-world accident, it can demonstrate how a particular vehicle design performs under the specific conditions tested.

Mercedes-Benz has therefore positioned the exercise as a demonstration of its overall safety engineering rather than a replacement for established crash-test procedures.

Mercedes-Benz Uses Thousands of Crash Simulations to Develop New Cars

Mercedes-Benz has investigated and reconstructed real-world accidents since 1969. The company reports that its research teams in Germany, China and India have analysed approximately 6,000 accidents, with findings incorporated into vehicle body structures, restraint systems and internal safety requirements.

Physical crash testing is only one stage of the development process. Before a new Mercedes-Benz model reaches the crash-test laboratory, engineers conduct extensive computer simulations to predict how the vehicle will respond to different types of impacts.

According to the manufacturer, each new model undergoes approximately 15,000 crash simulations during development. Artificial intelligence is also being used to improve the accuracy of these predictions and support engineering decisions.

The company additionally conducts around 150 physical crash tests for each new model, going beyond minimum legal requirements as it works to meet its own safety targets.

This combination of real-world accident research, virtual testing and physical crash testing allows engineers to investigate a wider range of potential collision scenarios and refine the vehicle’s structural design and occupant protection systems before production begins.

For the CLA, the two-vehicle side-impact test provides another demonstration of how those development methods can be applied to a particularly demanding accident configuration.

Mercedes-Benz Rescue Intelligence Will Connect Crashed Cars With Emergency Services

Alongside the crash test, Mercedes-Benz unveiled Mercedes-Benz Rescue Intelligence, a system designed to improve the information available to emergency responders following an accident.

The manufacturer plans to begin a gradual rollout from 2027. The system is intended to establish a direct connection between vehicles involved in accidents and emergency services, allowing rescue teams to access relevant vehicle and crash information while travelling to the scene.

Depending on technical availability and the circumstances of the collision, the information may include:

• The number of occupants inside the vehicle.
• The status of airbags and seat belts.
• Which doors are open.
• The temperature of the high-voltage battery.
• The condition of the vehicle’s high-voltage electrical system.

Access to this information could help firefighters and other emergency personnel assess the situation before reaching the accident scene. For example, knowing whether an electric vehicle’s high-voltage system has been compromised could help responders prepare the appropriate equipment and plan their approach.

Similarly, information about the number of occupants could help emergency teams anticipate the resources required to assist everyone involved.

The technology is particularly relevant as electric vehicles become more common on public roads and emergency services increasingly need vehicle-specific information to manage complex rescue operations.

Mercedes-Benz says the system is intended to help emergency responders make better-informed decisions sooner, potentially improving the efficiency of rescue operations when every second matters.

What the Mercedes-Benz CLA Crash Test Means for Vehicle Safety

The latest demonstration highlights two important aspects of modern automotive safety: protecting occupants during a collision and helping emergency services respond more effectively after one has occurred.

The structural performance of the two CLA models, the dummy measurements and the condition of the electric vehicle’s high-voltage battery provide useful evidence of how Mercedes-Benz’s safety systems performed in this particular test. However, the results should not be interpreted as a guarantee of injury-free outcomes in every collision or as an independent ranking against competing vehicles.

Mercedes-Benz’s broader safety strategy combines decades of accident research, thousands of virtual simulations, extensive physical testing and technologies intended to support post-crash rescue operations.

The planned introduction of Mercedes-Benz Rescue Intelligence from 2027 adds another layer to that approach by extending the focus beyond the moment of impact and towards the emergency response that follows.

As vehicle structures, driver assistance systems and electrified powertrains continue to evolve, the ability to protect occupants in severe side-impact collisions will remain a critical part of automotive engineering. Mercedes-Benz’s two-vehicle CLA crash test offers a striking demonstration of the company’s approach to that challenge.

Source: Mercedes-Benz