Component/system that malfunctioned: The braking and acceleration system, including the collision assistance (driver-assistance/automatic braking) feature. The vehicle is available for inspection upon request. How safety was put at risk: The car lags when braking and at times accelerates unexpectedly. On one occasion, the collision assistance system—which is designed to brake—instead caused the vehicle to accelerate. The most dangerous incident occurred when the car accelerated on its own into an intersection, nearly causing a collision. Reproduced/confirmed by a dealer or service center: The vehicle was taken to the Mercedes-Benz dealer twice regarding this issue. On both visits, the dealer reported that they found no problem. The fault has not been confirmed or reproduced by the dealer. Inspected by manufacturer, police, insurance or others: Inspected by the Mercedes-Benz dealer on two occasions (no fault found). UNKNOWN whether the manufacturer's engineering team, police, or insurance representatives have inspected the vehicle—to my knowledge, they have not. Warning lamps, messages, or symptoms prior to failure: UNKNOWN / none noticed. No warning lamps or dashboard messages were observed before or during these events. The symptoms (braking lag and unexpected acceleration) have been consistently noticed by all three drivers of the vehicle.

The vehicle stopped twice while being driven, with no apparent cause.

The vehicle experienced repeated electrical wiring harness damage in the lighting, tire and connector areas due to exposed and insufficiently protected wiring near socket terminations. On two separate service visits, authorized dealership technicians confirmed that rodents chewed through multiple exposed wires. The affected wiring involves critical electrical systems. The connectors lack adequate shielding, loom, or protective insulation at exposed termination points. The insulation ends before the connector, leaving conductors vulnerable to environmental exposure and rodent access. Warning indicators illuminated on the dashboard, and the vehicle required dealer repair on both occasions. The damaged wiring was inspected and confirmed by certified technicians and is available for inspection upon request. This condition presents a significant safety risk. If a rodent partially damages a wire connected to braking systems, steering systems, high-voltage components, sensors, or engine control systems, failure could occur while the vehicle is in motion. A sudden loss of power, interruption of propulsion, or malfunction of safety systems at highway speeds could increase the risk of a crash. Because this is an electric vehicle, sudden electrical interruption may result in complete loss of propulsion or charging capability. If such failure occurs in remote areas, at night, or in extreme weather conditions, occupants could be left stranded in potentially hazardous situations. This issue has occurred more than once, and no permanent preventive solution has been provided. The design appears to leave critical wiring insufficiently protected from foreseeable environmental and rodent exposure, creating an ongoing safety hazard. I request review of whether the wiring design provides adequate protection for safety-related electrical systems.

The car would not start, and displaying multiple rotating warnings. The car could not be shifted to neutral. The problem is going away after several hours by itself. Only check engine light remaining after car is able to start. The problem happened three times, most recent on October 20th. The last two problems were potentially addressed by updating software. Obviously the problem is still not fixed.

The car made a sudden and very hard brake in the middle of the street at around 40 - 50 miles per hour, on a empty road.