2023 MERCEDES-BENZ EQB 300 4MATIC — Complaint #2153593
Open-data reference.
NHTSA Complaint about ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:MANAGEMENT SYSTEM/ENERGY CONTROL MODULE (BMS/BECM):SOFTWARE filed December 3, 2025
NHTSA complaint #2153593 (ODI reference 11702631) concerns a 2023 MERCEDES-BENZ EQB 300 4MATIC and was filed on December 3, 2025. The owner reports the failure occurred on November 17, 2025. The report was geocoded to California based on the filer's self-reported location. The affected component is categorized as electrical system:propulsion system:traction battery:management system/energy control module (bms/becm):software, one of NHTSA's standardized taxonomy codes used to group defect patterns across make, model, and year.
The filer flagged the following severity indicators: crash: no, fire: no, injuries: 0, fatalities: 0. No crash, fire, or fatality was associated with this report, which places it in the early-warning stream rather than the priority-review stream. Because a VIN was supplied, this complaint is tied to a specific vehicle and not just a model-year cohort.
Individual complaints are consumer-submitted and unverified by NHTSA engineers — the agency's role at this stage is to collect, index, and make them searchable. What matters for federal action is the pattern: when many owners of the same MERCEDES-BENZ EQB 300 4MATIC cohort independently describe similar electrical system:propulsion system:traction battery:management system/energy control module (bms/becm):software failures, defect investigators have grounds to open a PE and request manufacturer data. Related filings for the same vehicle and component appear below, and the detail page for the full 2023 MERCEDES-BENZ EQB 300 4MATIC shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
I own a 2023 Mercedes-Benz EQB 300. After the dealership performed the recall Update Battery Management System Software â Campaign 2025040005 / 25V050 / 25P5496507, my vehicle immediately experienced a significant loss of battery performance. Problems that began right after the recall update: Driving range decreased by approximately 25â30 miles. DC fast-charging speed dropped from about 100 kW before the update to a maximum of around 80 kW after the update. Vehicle was performing normally before the recall software was installed. This update appears to have negatively affected the performance, efficiency, and charging capability of the high-voltage battery. Mercedes has not yet provided an explanation or solution. I am requesting that NHTSA investigate whether the recall update is improperly derating or limiting the high-voltage battery and whether this safety recall is causing reduced functionality for other EQB owners.
Complaint Details
| NHTSA Complaint ID | 2153593 |
| ODI Number | 11702631 |
| Date Filed | December 3, 2025 |
| Failure Date | November 17, 2025 |
| VIN | W1N9M0KB6PN |
Source: NHTSA Vehicle Complaints Database. Component taxonomy and severity codes are standardized by NHTSA Office of Defects Investigation.
Read our methodology — how this data is sourced, computed, and verified.