2022 Mercedes-Benz E350

I own a 2022 Mercedes-Benz E350. The front glass roof panel located directly above the windshield developed a large crack while the vehicle was parked. The crack extends nearly the full length of the panel and includes areas where the glass has separated along the fracture. I am not aware of any collision, road debris, or object striking the vehicle before the damage was discovered. The damaged panel is available for inspection. I am concerned that if this type of failure were to occur while the vehicle is in motion, broken glass could fall into the passenger compartment or be shed onto the roadway, creating a potential safety hazard for the driver, passengers, and other motorists. The vehicle has been inspected by a Mercedes-Benz dealership, and the damage has been documented for repair. To my knowledge, there were no warning messages, alerts, or other symptoms before the crack appeared. The cause of the failure is unknown. I am aware of reports from other Mercedes-Benz owners describing similar cracking of roof glass panels. Based on those reports, I am concerned this may indicate a broader design or manufacturing issue and respectfully request that NHTSA investigate whether this represents a pattern affecting similar vehicles.

NHTSA ID

11752247

Incident

Jun 8, 2026

This vehicle on an ongoing basis is reporting false speed limits. It consistently abruptly drops the indicated speed limit from 70MPH on [XXX] northbound in Salt Lake City. the vehicle slows itself abruptly in traffic that is sometimes dense and traveling 70 to 80. An eventual rear end collision seems likely which could involve multiple vehicles. It intermittently presents the same risk in other locations with no as yet recognized associated variables such as the one location on [XXX]. Exact start and stop of the erroneous speed limit are not consistent. Sometimes brief and sometimes for a mile or more. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11709449

Incident

Jan 7, 2026

Major issue found with engine cylinder head in various models with 2.0 Liter Turbo charged engines (Engine code M260 or M264). Cylinder heads have premature wear at valve seats, causing engine misfires and unsafe driving conditions. (Sudden loss of power, even on freeways.) Mercedes-Benz had improved cylinder head design to mitigate this issue, thus proving that they knew it was their product quality that is causing these unsafe issues. Mercedes-Benz even put out a service bulletin to address these defective cylinder heads. This publication can be found under XENTRY, Topic Number LI01.30-P-072328, Version 8, published 9/26/2023. My contact at Mercedes Dealer informed me that they are seeing a drastic increase in this problem affecting roughly over 25% of the models with these engines. They are beginning to fail at around the same time as the warranty expires. There are numerous stories on the internet concerning this issue, examples can be found in the following links: https://www.facebook.com/groups/mercedesbenzowners/posts/10162557430080937/ https://www.mercedesgleforum.com/threads/cylinder-head-replacement-11-500.4399/ We contacted Mercedes-Benz US Headquarters, they do not believe it is their problem and throws petty money around in attempt to strong-arm owners to shut us down. All we request was for Mercedes-Benz to own up to their quality issues and handle the repairs at their expense. Please help me among all the other owners that this is affecting. Thank you in advance for your assistance in this matter.

NHTSA ID

11695193

Incident

Jun 1, 2025

On June 16, 2024, while driving my 2022 Mercedes E 350 with my two young children in the car, my sunroof suddenly and literally exploded. Fortunately, the sunroof screen was closed, which prevented us from sustaining any direct injuries. However, the entire sunroof shattered and is now gone. The explosion sounded like a gunshot, causing immediate and extreme distress. My body began shaking uncontrollably from the shock and fear of the incident. This unexpected event posed a severe safety hazard, and I am deeply concerned about the potential risks to other drivers with similar vehicles. **Vehicle Information:** - Make: Mercedes-Benz - Model: E 350 - Year: 2022 - Mileage: 87,000 miles **Incident Information:** - Date of Incident: June 16, 2024 - Description of Incident: Sunroof explosion while driving with children in the car. I urge the NHTSA to investigate this matter as it is a critical safety issue that could have resulted in serious injuries or worse.

NHTSA ID

11595117

Incident

Jun 16, 2024

Auto break suddenly activated during traffic with no obstruction ahead. Also Automatic Headlamp Mode Inoperative comes on and off

NHTSA ID

11568552

Incident

Jun 13, 2022

My vehicle suddenly stopped in the middle of road. It showed gas tank empty though tank had half tank gas. i would have been hit by a vehicle behind me. Fortunately, there were no vehicles behind me. i filled the remaining half tank , then car started again. I believe that gas sensor was not working. I dropped the vehicle for service to the mercedes benz dealerwith full tank of gas. It was showing empty gas tank and i can drive zero miles. Dealer told me after 3 days that gas tank needs to be replaced. My concern is that , manufacturer might have made a defective gas sensor or gas tank. This may lead for deaths. It may need a recall , if you have received similar complaints. I contacted the dealer who sold the vehicle by email. I didn't get any response. I am unable to upload that file here. upload file in this link is not working.

NHTSA ID

11561167

Incident

Nov 27, 2023

The panoramic sunroof exploded while inside the car without warning. Contacted the dealership/service center on Friday 9/15/2023, was told they have not received a memo regarding the panoramic sunroofs in the 2022 E350, however; this is a know problem. I was told that this is not covered of my warranty because they assume something had to hit the glass, provided evidence via my security camera that not fell and hit the glass. Even after this happened the warning system did not even go off to indicate there was a problem.

NHTSA ID

11545429

Incident

Sep 15, 2023

The contact owns a 2022 Mercedes-Benz E350. The contact stated that on several occasions while driving at various speeds, the vehicle decelerated while the accelerator pedal was depressed. The contact was able to turn off and restart the vehicle. An unknown warning light was illuminated. The vehicle was taken to the dealer where it was diagnosed a fuel pump failure. The contact was informed that the fuel pump needed to be replaced. The vehicle was repaired; however, the contact stated that the following day she smelled a fuel odor coming from the vehicle and became aware of a puddle of fuel on the ground underneath the vehicle. The contact stated that she checked the fuel gauge and noticed that the fuel level was low. The dealer was notified of the failure and the contact was advised to tow the vehicle back to the dealer. The contact stated that she received the NHTSA Campaign Number: 23V445000 (Fuel System, Gasoline). The vehicle had not yet been repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 14,403. VIN tool confirms parts not available.

NHTSA ID

11540275

Incident

Aug 22, 2023

Mileage

14,403 mi

This NCU replaces the prior NCU issued on May 15, 2025, and contains additional MY 2023 and MY 2024 vehicles which are highlighted below. In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (“MBUSA”) is extending the warranty coverage on the Diagnostic Module for Tank Leakage detection (DMTL) in certain Model Year (“MY”) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 10 years/120,000 miles (vehicles certified as LEV II) and 15 years/150,000 miles (vehicles certified as LEV III), whichever occurs first, for the following condition: •Under certain circumstances, the DMTL may trigger erroneous Diagnostic Trouble Code (DTC) entries that may result in the illumination of the Check Engine Malfunction Indicator Lamp (‘MIL’).

Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to cracking of the microweld between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened. See also LI33.20-P-078406 Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove side shafts 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") with Molykote and leave to dry for "one hour" in removed condition 4. Reinstall side shafts Note: Before using the antifriction coating (Molykote), stir it or shake it thoroughly for (at least 1 minute).

Complaint Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop menu, e.g., 505 or 550A, which includes a service A. Cause The root cause is currently being investigated. Remedy To determine the cause, the instrument cluster control unit (N133/1) and powertrain control unit (N127) logs are required before confirming the service or correction using XENTRY Diagnosis. Please open a TIPS case to BCE inbox with the requested information in the attachments.

Complaint The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the HERMES control unit (N112/9) is not supported for gray-market vehicles. Cause Before deactivating the HERMES control unit (N112/9), it must be clarified by the legal department of the respective MPC whether and under what conditions deactivation may be carried out. If deactivation is not permissible under applicable law, the HERMES control unit (N112/9) must not be deactivated. Remedy Please inform the customer that, following deactivation, the vehicle will no longer be able to place an automatic emergency call, nor will the customer be able to place a manual emergency call. After deactivation, the Mercedes-Benz Digital Extras will also no longer be available. Please have the attached sample form checked by your market's legal department, adapted to local requirements if necessary, and approved. Furthermore, after informing the customer about the effects of deactivation, please have the workshop complete and sign the approved form together with the customer, and send it to the MPC via a TIPS case for audit-compliant documentation. Furthermore, the workshop must affix a sticker to the emergency call button cover on the overhead control panel and to the emergency call button itself. After affixing, pictures of the overhead control panel need to be attached to the TIPS case for audit-proof documentation. After deactivation, the HERMES control unit (N112/9) is in the "Out of Service" operating status, and the display "SOS NOT READY" appears in the Audio/COMAND system. This display message tells the customer that the emergency call function is not available. In detail, the following steps must be carried out 1. The workshop must inform the customer about the effects of deactivation (see above) 2. Legal review by the MPC Legal department to determine whether deactivation is permissible for the vehicle and provision of a market-specific customer form based on the examples (see "Example - Deactivation communication module HERMES customer declaration English V3.0.pdf") 3. Completion of the market-specific customer form by the workshop and obtaining the customer’s signature 4. Creation of a XSS ticket by the workshop for the MPC with the signed customer form attached 5. Written confirmation of legally reviewed and approved deactivation by the MPC in the TIPS case (see attachment How+to+request+adding+Code+09o+via+XSS+v2.pdf, point 1) 6. Creation of an XSS ticket for documentation of the SA code "09o" (zero nine oh) in the Vehicle Documentation System (see attachment How+to+request+adding+Code+09o+via+XSS+v2.pdf, steps 2–7) 7. Ordering of stickers (part number A9078172900), quantity: 2 8. Affixing of the sticker (part number A9078172900) to the cover of the emergency call button on the overhead control panel (see attachment HERMES-Deactivation_+pictures+of+sticker.png) 9. Affixing of the sticker (part number A9078172900) to the emergency call button on the overhead control panel (see attachment HERMES-Deactivation_+pictures+of+sticker.png) 10. Taking photos of the applied stickers and attaching them to the TIPS case 11. After the XSS ticket has been successfully processed, the communication module must be deactivated using XENTRY: • Connect XENTRY Diagnosis • Access the HERMES control unit (N112/9) • "Adaptation" tab, menu item "Teach-in processes" -> "Deactivation" • Follow the instructions

Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the instrument cluster. In addition, the following two conditions are also met: • HERMES (N112/9) control unit: event code B15CE00 is ACTIVE and STORED (A+S) • Vehicle Documentation System: For the HERMES control unit, the EID1, EID2, ICCID, IMEI, IMSI, TELNR fields in the "Identification/Serial number" column have the value "-" Cause Still under analysis Remedy Recommission the HERMES control unit (N112/9) with XENTRY Diagnosis 03/2026 and add-on 33399 installed or carry out the procedure with a newer version of XENTRY Diagnosis: XENTRY→ "N112/9 - Control unit for telematics services (HERMES)" -> "Adaptations" -> "Control unit commissioning" -> "Commissioning of previously installed control unit"

Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, June 11, 2026. After June 11th, returns of these parts will no longer be accepted. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. All returned parts will be replaced in accordance with the chart provided below.