2026 Mercedes-Benz E350 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2026 Mercedes-Benz E350, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Driver assistance133.3%
- Electrical133.3%
- Powertrain (other)133.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
While driving my 2026 Mercedes-Benz E350 (rear-wheel drive) at approximately 40 mph, I began slowing for a traffic light. As I approached the intersection, the vehicle suddenly experienced what appeared to be a catastrophic electronic failure. Without warning, the vehicle became almost completely inoperable while the engine continued to run. The vehicle abruptly came to a stop and became immobilized. The rear wheels locked, preventing the vehicle from moving. I was unable to shift the transmission out of Drive or into any other gear. The gear selector became completely unresponsive. I was unable to shut the vehicle off. Numerous warning lights and system malfunction messages appeared simultaneously across the instrument cluster. The windshield wipers activated on their own without any driver input. The windows rolled down automatically and would not roll up. Nearly every electronic system appeared to malfunction at the same time. I lost the ability to control the vehicle normally because I could not shift gears, restart the vehicle, or clear any of the system failures. The engine continued running throughout the event, but the vehicle was effectively disabled and could not be driven. Emergency personnel were dispatched to guide the flow of traffic as the vehicle was obstructing traffic. This failure created an extremely dangerous traffic situation. The vehicle became immobilized in the roadway without warning during normal driving. As the driver I had no reasonable ability to anticipate or respond to this type of sudden total electronic failure. The vehicle has 1,117 miles. Unlike other reports to the NHTSA, this was not an isolated warning light or infotainment issue. The simultaneous failure of multiple independent systems suggests a significant electrical, software, communications network, or control module malfunction. The vehicle is currently with the dealership, they have been unable to diagnose the problem as the vehicle remains unresponsive.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
While driving my 2026 Mercedes-Benz E350 (rear-wheel drive) at approximately 40 mph, I began slowing for a traffic light. As I approached the intersection, the vehicle suddenly experienced what appeared to be a catastrophic electronic failure. Without warning, the vehicle became almost completely inoperable while the engine continued to run. The vehicle abruptly came to a stop and became immobilized. The rear wheels locked, preventing the vehicle from moving. I was unable to shift the transmission out of Drive or into any other gear. The gear selector became completely unresponsive. I was unable to shut the vehicle off. Numerous warning lights and system malfunction messages appeared simultaneously across the instrument cluster. The windshield wipers activated on their own without any driver input. The windows rolled down automatically and would not roll up. Nearly every electronic system appeared to malfunction at the same time. I lost the ability to control the vehicle normally because I could not shift gears, restart the vehicle, or clear any of the system failures. The engine continued running throughout the event, but the vehicle was effectively disabled and could not be driven. Emergency personnel were dispatched to guide the flow of traffic as the vehicle was obstructing traffic. This failure created an extremely dangerous traffic situation. The vehicle became immobilized in the roadway without warning during normal driving. As the driver I had no reasonable ability to anticipate or respond to this type of sudden total electronic failure. The vehicle has 1,117 miles. Unlike other reports to the NHTSA, this was not an isolated warning light or infotainment issue. The simultaneous failure of multiple independent systems suggests a significant electrical, software, communications network, or control module malfunction. The vehicle is currently with the dealership, they have been unable to diagnose the problem as the vehicle remains unresponsive.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
While driving my 2026 Mercedes-Benz E350 (rear-wheel drive) at approximately 40 mph, I began slowing for a traffic light. As I approached the intersection, the vehicle suddenly experienced what appeared to be a catastrophic electronic failure. Without warning, the vehicle became almost completely inoperable while the engine continued to run. The vehicle abruptly came to a stop and became immobilized. The rear wheels locked, preventing the vehicle from moving. I was unable to shift the transmission out of Drive or into any other gear. The gear selector became completely unresponsive. I was unable to shut the vehicle off. Numerous warning lights and system malfunction messages appeared simultaneously across the instrument cluster. The windshield wipers activated on their own without any driver input. The windows rolled down automatically and would not roll up. Nearly every electronic system appeared to malfunction at the same time. I lost the ability to control the vehicle normally because I could not shift gears, restart the vehicle, or clear any of the system failures. The engine continued running throughout the event, but the vehicle was effectively disabled and could not be driven. Emergency personnel were dispatched to guide the flow of traffic as the vehicle was obstructing traffic. This failure created an extremely dangerous traffic situation. The vehicle became immobilized in the roadway without warning during normal driving. As the driver I had no reasonable ability to anticipate or respond to this type of sudden total electronic failure. The vehicle has 1,117 miles. Unlike other reports to the NHTSA, this was not an isolated warning light or infotainment issue. The simultaneous failure of multiple independent systems suggests a significant electrical, software, communications network, or control module malfunction. The vehicle is currently with the dealership, they have been unable to diagnose the problem as the vehicle remains unresponsive.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .