An Intoxalock ignition interlock device was installed in my 2023 Mercedes-Benz E-Class on May 7, 2026. Following installation, the vehicle experienced repeated electrical/no-start problems and incidents in which it became immobilized and could not be moved, requiring towing. On one occasion the vehicle became disabled on a roadway/highway, leaving me in a dangerous position with traffic passing around me. When the vehicle is immobilized, I cannot simply move it to a safe location, and Intoxalock has not been able to restore vehicle operation remotely. I have had to wait for towing assistance, sometimes for extended periods. Independent diagnostic/service facilities have evaluated the vehicle. One attributed battery drain to the Intoxalock-related problem. Another attributed starter damage to it. Service documentation also reflects diagnosis of the Intoxalock system and reinstallation/reconnection of the device and wiring. Documentation is available, and the equipment/vehicle can be made available for inspection upon request. The vehicle now displays numerous dashboard warning lights and is not operating normally. Safety-related systems are malfunctioning, including ABS, parking assistance, camera functions, and automatic braking/collision-avoidance functions that previously operated normally. I am concerned that the Intoxalock device, its installation/wiring, or its interaction with this vehicle’s electrical/electronic systems may be contributing to these failures. I am requesting that the federal safety agency investigate whether this aftermarket ignition-interlock equipment presents a safety or compatibility risk, particularly when a vehicle can become immobilized in traffic and safety systems may be affected.
The worst 2023 Mercedes-Benz E350 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Brakes1
- Electrical1
- Tires1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes1
- Electrical1
- Tires1
Recalls 3
Fuel system, gasoline: delivery: fuel pump
- What is wrong
- Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2024 GLE, GLS, C-Class, E-Class, S-Class, SL, GLC, CLS, AMG GT, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, causing a loss of drive power.
- Risk
- A loss of drive power can increase the risk of a crash.
- Remedy
- Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 28, 2024. Owner notification letters will be mailed in phases, on February 23, 2024, April 19, 2024, June 28, 2024, August 9, 2024, October 1, 2024, and December 2, 2024. Owners may contact MBUSA customer service at 1‑800‑367‑6372. This recall is an expansion of the federal safety agency recall number 23V‑445.
Recall number 23V880000 · Recall details
Electrical system: ADAS: blindspot: sensors
- What is wrong
- Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 E450, E350, AMG E63 S, AMG E53, CLS450, AMG GT53, and AMG GT43 vehicles. Due to a software error, the exit warning system audio and visual warnings may fail to alert occupants about approaching vehicles.
- Risk
- Failure to alert occupants of an approaching vehicle can increase the risk of a crash or injury.
- Remedy
- Dealers will update the exit warning system software, free of charge. Owner notification letters were mailed September 8, 2023. Owners may contact MBUSA customer service at 1‑800‑367‑6372. MBUSA's number for this recall is 2023080005.
Recall number 23V574000 · Recall details
Fuel system, gasoline: delivery: fuel pump
- What is wrong
- Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, which can result in a loss of drive power.
- Risk
- A loss of drive power can increase the risk of a crash.
- Remedy
- Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024. Owners may contact MBUSA customer service at 1‑800‑367‑6372. MBUSA's number for this recall is 2023070012.
Recall number 23V445000 · Recall details
Technical service bulletins for the 2023 Mercedes-Benz E350 143
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz...
- Fuel/propulsion system
- In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the...
- Oil seeping from turbocharger oil return line at connection to engine block
- Customer complaints relating to automatic transmission 725.0 (NAG3 Classic /9G‑TRONIC automatic...
- Slight creaking noises when steering
- Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is...
- Red coolant warning in instrument cluster
- Only vehicles with a variable transfer case are affected
- Clanking noise from the area of the speakers in the doors
2023 Mercedes-Benz E350 fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 2.0L 4‑cyl | RWD | 23 | 31 | 26 |
What 2023 Mercedes-Benz E350 owners say
Most recent owner complaints, unedited.
While driving the vehicle in normal road conditions the car suddenly stop and activated the seat belts. This incidents has happened 4 times. The vehicle has been taken to the Mercedez-Benz service and it gas been released with no findings. I am concerned with this safety issue on my leased vehicle and the risk to cause a collision or injury. The last incident occurred on 3/8/2026, while driving the car.
I am a small auto repair shop, in Houston, Texas. The driver's (left) side rear brake caliper bracket appears to be defective. The car came in with the mental to metal break wear on the driver's side, while the passenger's side brake pads still at 50% life. The break wear sensor didn't trigger the light, because there is only one sensor on the passenger side. Upon further investigation found that the inner brake pad was catching on the caliper bracket. Same was true for the new brake pad set as well. Fault appears to be in the caliper bracket. This could be a designed flaw by the manufacture., if so, it is your responsibility to get them.
Have replace 5 tires since April 2024 due to damage from pot holes
This is the second report filing about the trunk lid closing without initiating the automatic closure. In order to keep this record accurate, the vehicle was brought into the Mercedes Benz dealer, (where it was purchased), on May 23, 2023. The service advisor came to the car to instruct me on how to use the mechanism. He was unable to operate it correctly either. The car was also brought in for other needed repairs. When the car was returned to me on May30th, this same service advisor reported to me that the dealership was unable to correct the problem with the trunk lid mechanism. On June 12, when I was retrieving some items from my trunk, NOT using the automatic mechanism, the trunk lid unexpectedly crashed down and struck me in the head. I experienced headache and bruise on the back of my head. The salesman and administrative team at the dealership said they declined to return my phone calls, or speak directly with me about this matter, due to fear of being sued.
May 4, 2023 at approximately 5:45 PM, while reaching into the trunk of my car, the trunk lid came crashing down on me. To avoid being struck on the head, I blocked it with me left forearm. The trunk lid caused a large nasty and painful wound. I immediately texted my sales person, and text him a picture of my injury. I also left a voicemail message for him at the dealership. Unfortunately, this is not the first time the issue with the truck lid has happened to me. On another occasion, while reaching into the trunk, I was able to avoid being struck by the trunk lid, when it unexpectedly came crashing down. At approximately 8:50 AM, on May 5, 2023, a follow-up call was made to the dealership since my salesman did not return my call. The male who I spoke to about this serious safety issue assured me that I would receive a return call the same day and listed three male supervisors by name. Since I did not receive this promised return call, I made an appointment with the service department to document this dangerous issue. OF NOTE: my feet were not under the rear pumper to activate the trunk lid, and the obstacle feature failed to stop the lid from crashing down.
Compare the 2023 Mercedes-Benz E350
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Questions about the 2023 Mercedes-Benz E350
Is the 2023 Mercedes-Benz E350 reliable?
Owners have filed 6 complaints about the 2023 Mercedes-Benz E350, fewer than a typical E350 model year.
What is the most common problem with the 2023 Mercedes-Benz E350?
Brakes, with 1 complaint. Next is electrical (1).
How many recalls does the 2023 Mercedes-Benz E350 have?
3 recalls, covering fuel system, gasoline and electrical system.
What year does the Mercedes-Benz E350 have bad brakes?
The Mercedes-Benz E350 model years with the most brakes complaints are 2006 (54 complaints), 2014 (50 complaints) and 2013 (32 complaints).
What gas mileage does the 2023 Mercedes-Benz E350 get?
Official estimates for the 2023 Mercedes-Benz E350 range from 26 mpg combined. The most efficient version (2.0L 4-cyl, RWD) gets 23 city and 31 highway.
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