2024 Mercedes-Benz EQB 250+

Learning that my vehicle is subject to a battery-related recall has seriously undermined my trust. Battery defects in electric vehicles can present risks that include thermal events, loss of vehicle functionality, and other potentially dangerous situations. My vehicle has had warning signs, I received emails about the risks my vehicle can present directly from Mercedes. I have had my vehicle in the service department two times in two months for this same issue. My vehicle is overheating while charging.

NHTSA ID

11746037

Incident

May 1, 2026

Electrical System/Climate Control/Energy Management DESCRIPTION OF PROBLEM: On XXX, I exited my 2024 Mercedes-Benz EQB 250+ at a parking lot in [XXX] to briefly enter a business. I left the vehicle running in Park and I took the key fob with me and left the climate control (AC) active. Three occupants remained inside the car: my wife, son, and dog. Without any warning, alert, or notification to the remaining occupants, the car automatically shut down its drivetrain and climate control system after approximately 5 to 10 minutes of idle time. The interior temperature in TX in summer conditions can reach dangerous levels within minutes of AC loss, creating a life-threatening situation for car occupants. The car provides no prominent warning to the driver at the time of exit that this automatic shutoff will occur. There is no accessible, clearly labeled setting to disable this behavior. The only known workaround — pressing a small fan icon on the lower display screen before opening the door after powering off — is non-intuitive, undisclosed in routine car operation, and limited to approximately 30 minutes. This design is in stark contrast to competing electric cars (e.g., Tesla) which offer an explicit, clearly labeled "Keep Climate On" or "Dog Mode" feature that maintains cabin temperature indefinitely when occupants are present. In high-heat states such as Texas, where temperatures routinely exceed 100°F, an unexpected and unannounced climate system shutdown poses a serious and foreseeable risk of heat stroke, injury, or death, particularly to children, elderly individuals, and animals who cannot self-rescue. I am requesting that NHTSA investigate this as a potential safety defect and evaluate whether Mercedes EQ cars equipped with this automatic idle shutoff behavior require a design change, software update, or recall to add adequate safeguards. No crash or injury occurred in this incident. This complaint is being filed to prevent future harm. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA

NHTSA ID

11744015

Incident

Jun 14, 2026

At the time of the incident, I was pulling into a parking space in a parking lot near a park. I was traveling at approximately 3-5 miles per hour, consistent with idle or walking speed during a routine parking maneuver. I was nearly stopped and aligned with the parking space when the vehicle suddenly and unexpectedly accelerated without driver input. This occurred from a near-idle speed in a parking lot, not during roadway driving. During the unintended acceleration, the vehicle traveled over multiple curbs on both sides. No audible warnings, no beeping, no proximity alerts, no forward-collision warnings, and no automatic emergency braking activated at any time, despite the vehicle crossing curbs and approaching fixed objects. No warning lights illuminated. The vehicle continued accelerating without driver input and struck and knocked down a fixed light pole. After the impact, the vehicle continued moving forward until I immediately slammed on the brake and brought it to a stop in the middle of the adjacent roadway. No orange cones or warning devices were present prior to the incident. Any cones visible in photos were placed after the collision by responders for safety and traffic control. The sudden acceleration and complete lack of safety-system response occurred during a low-speed parking maneuver where the vehicle should not have accelerated beyond idle speed.

NHTSA ID

11720017

Incident

Dec 23, 2025

At the time of the incident, I was pulling into a parking space in a parking lot near a park. I was traveling at approximately 3–5 miles per hour, consistent with idle or walking speed during a routine parking maneuver. I was nearly stopped and aligned with the parking space when the vehicle suddenly and unexpectedly accelerated without driver input. This occurred from a near-idle speed in a parking lot, not during roadway driving. During the unintended acceleration, the vehicle traveled over multiple curbs on both sides. No audible warnings, no beeping, no proximity alerts, no forward-collision warnings, and no automatic emergency braking activated at any time, despite the vehicle crossing curbs and approaching fixed objects. No warning lights illuminated. The vehicle continued accelerating without driver input and struck and knocked down a fixed light pole. After the impact, the vehicle continued moving forward until I immediately slammed on the brake and brought it to a stop in the middle of the adjacent roadway. No orange cones or warning devices were present prior to the incident. Any cones visible in photos were placed after the collision by responders for safety and traffic control. The sudden acceleration and complete lack of safety-system response occurred during a low-speed parking maneuver where the vehicle should not have accelerated beyond idle speed

NHTSA ID

11708644

Incident

Dec 23, 2025

April 3, 2025. approx 2:30pm Glass panoramic sunroof spontaneously exploded going down hwy 431in Huntsville Al. approx speed was 50-55mph. Vehicle had been parked in the parking deck at work since 6am. Exterior Temp was approximately 84 Degrees F. Sunroof was closed. Sounded like a gunshot and the glass was sucked out. Interior sunshield was closed and prevented glass from entering vehicle.

NHTSA ID

11652624

Incident

Apr 3, 2025

Complaint During part of the steering movement, it feels heavier or more difficult to steer in the same spot every time. OR Rattling, humming, dry sliding/gravel noise from the electric steering system when steering (see attachment). Complaint does not impact the ability to safely steer or control the vehicle. Cause Ball screw drive (KGT) of electric steering damaged by: 1. External force due to: ‑ Hitting the curb/posts with the front wheels. ‑ Driving over obstacles (e.g. pothole/ threshold/ speed bump/ gully) at an inappropriate speed. 2. Corrosion/ water ingress through a damaged boot (see attachment). ‑ Cracks (1) ‑ High pressure cleaner (2) ‑ Animal bite (3) See various examples listed in the attachments for examples of outside influence. Remedy Remove boot clamps closest to steering gear housing on both left and right (as seen in "Steering Rack Boot Clamp Location"). Pull back boot and inspect for rust, broken end stops, water, or any other anomalies. Replace electric steering. Note: Steering gears replaced due to outside influence or damage must not be claimed under warranty!

Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double‑clicking on the button instead. This reduces the likelihood of the button being activated accidentally or unintentionally. The recoding can be carried out as follows: 1. Add SA Code O19 into VeDoc (O for Oscar, not "zero") • an XSS ticket may be necessary to add the SA code 2. Perform SCN coding of EIS N73 control unit 3. Deactivate the vehicle key (a successful deactivation is indicated by the LED lighting up 2x briefly and then 1x for a long period). 4. Place the vehicle key in the storage compartment on the key symbol and turn on the ignition. IMPORTANT: all other vehicle keys must be outside the recognition range of the vehicle when doing this! Perform steps 3 and 4 successively for all vehicle keys. Notes: 6th, 7th and 8th generation keys can be deactivated as follows: Up to modification year 22/1 by double clicking the "Lock button" As of modification year 22/1, by press and holding the “Lock button", then double‑click the “Unlock button" at the same time. On model series 167, the storage compartment with the key symbol is located in the armrest. The SCN coding from the EZS is only transferred correctly to the vehicle key under the following conditions: Only one vehicle key is located in the vehicle, this key has been deactivated and it is positioned on the marking in the storage compartment for the data transfer. The costs for this adaptation are to be borne by the customer. For the newer BR 174, 178, 244, 248, 520, and 540, a software update must be initiated, as there is no way to perform SCN coding.

Complaint Customer Complaint: - AC charging is not possible. - The departure time, charging pause, location-based charging or target SOC limit is automatically set to 50% or to a random value in the Mercedes me application or in the charging settings on the head unit display. (Picture 1 & 3) - Incorrect notifications appear in the Mercedes me application for charging-related functions. (Picture 2) Related DTCs in quick test: No related fault codes (DTCs) are stored in the relevant control units. CPC3 - N127 (Drivetrain control unit) OBL223_GEN4 - N83/11 (Alternating current charger for high-voltage battery) DCB223 - N116/5 - Direct current charge connection unit (DCCU) Picture1 The target SOC limit is automatically set to 50% or any random values during charging. Picture 2 Incorrect notification Example “Unable to unlock charging cable. Picture 3 Incorrect settings of charge interruption or pause. (If applicable) Cause - The Customer shares their Mercedes me credentials (password) with a third-party application, for example, a wall box application. This causes the Mercedes Benz backend server to receive random requests to reset the maximum SOC, departure time, charging pause, etc. - Charging settings are set incorrectly, for example, incorrect departure time, charging program, charging interruption/ pause, etc. Remedy The remedies below may vary depending on the customer complaint. Refer to the remedy that best matches the customer complaint. Remedy 1: The target SOC limit is automatically set to 50% or to random values during charging. - Change the Mercedes me login password on the Mercedes me homepage. (My Account > Login and Security > Reset). (Refer to Annex 1). Previously granted authorizations should then be revoked so that the charging settings can no longer be changed by external applications. Advise customers not to share the new password again. - Are there any sub-users? If yes, revoke their rights and reassess the function. -If differences between the vehicle and the Mercedes me app are visible, a new synchronization is recommended. Turn off Digital Extras through the Mercedes me app or the MMCR portal, and then turn the services on again. Remedy 2: Incorrect notifications in the Mercedes me app for charging-related functions. - Restart synchronization between the app and backend. Turn off Digital Extras through the Mercedes me app or the MMCR portal, and then turn the services on again. (Refer to Annex 2) Remedy 3: Incorrect charge interruption or pause setting. - Perform a factory reset of the head unit (A26/17). (Home > Functions > System > Reset), or turn off/correct all charging settings. (Refer to Annex 3) Additional Information: (Good to know) The LED on the charging inlet or socket indicates whether charging is completed or paused. 1) If the target SOC is reached, the charging inlet LED lights up Blue/Green without flashing. 2) If charging is paused, the charging inlet LED lights up orange without flashing. Additionally, the head unit charging settings display a charging pause. Note: Do not replace any hardware components for these complaints. If the complaint cannot be solved, please contact via TIPS or CAC.

Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics. Cause Various root causes Remedy See attached diagnostic guide.

Complaint AC and DC charging are not possible. The white LED on the charging inlet completely goes OFF after plugging in the charging cable. Related DTCs in quick test: There are no related fault codes (DTCs) stored in relevant control units. CPC3 - N127 (Drivetrain control unit) OBL223_GEN4 - N83/11 (Alternating current charger for high-voltage battery) DCB223 - N116/5 - Direct current charge connection unit (DCCU) Cause Control pilot (CP) circuit in DCB (N116/5: Direct current charge connection unit) might be not functional due to electrical overstress from EVSE (Electric Vehicle Supply Equipment | Charging Station). Remedy Refer to the charging cable actual values in DCB (N116/5). The actual value “Charging cable at charging station” and “status of pilot function” shows “Charging cable NOT PLUGGED IN” & “CP not connected” respectively, even though the charging cable is connected on both sides. This confirms a possible breakdown of Control Pilot (CP) circuit inside the DCB. Measurement of the resistance of Proximity Pilot (PP) and Control Pilot (CP) at the charging socket (G10) (see Annex “Resistance measurement Proximity Pilot (CP) and Control Pilot (CP)”)

Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment. Information: Please refer to this document in the warranty claim and, after completing diagnosis, select the damage code corresponding to the component part that caused the problem. • If the noise stops when the door trim is removed, please proceed in accordance with LI72.10-P-067691. Information: In this case, do not use a damage code for the speakers in the warranty claim!