2023 Mercedes-Benz Sprinter 2500 problems

Filed Oct 11, 2026 · Fuel system, Transmission · CA

The High-Pressure Fuel Pump (HPFP) and corresponding fuel delivery pressure regulator/sensors have suffered an internal mechanical failure. The system intermittently fails to maintain commanded rail pressure, leading to critical engine cylinder misfires (P0302, P0304) and severe long-term fuel adaptation breaches (P00C600, P008992, P017184, P218862). This defect is physically causing raw gasoline to leak into the combustion chambers, oil crankcase, and exhaust tract. The vehicle and all compromised components are fully intact and available for immediate inspection upon request. My life and the safety of surrounding motorists were put at risk during a severe incident on the highway. While driving uphill in fast-moving traffic, the high-pressure fuel pump experienced an abrupt mechanical failure/pressure drop. The Engine Control Unit immediately plunged the van into Limp Mode, causing an uncommanded, violent loss of propulsion. The vehicle became entirely unresponsive to the accelerator pedal. Managing a large, heavily loaded commercial vehicle that suddenly dropped speed on a highway incline nearly triggered a catastrophic multi-vehicle rear-end collision. The underlying mechanical defect has been repeatedly ignored by authorized dealerships due to diagnostic negligence. The vehicle has been presented to Mercedes-Benz of Fairfield and another authorized location three separate times. Technicians relied solely on surface-level live data, clearing active trouble codes and releasing the vehicle unrepaired. The problem routinely reproduces itself every 30 to 45 days once the computer's long-term fuel software can no longer mathematically compensate for the physical fuel drop. Independent diagnostic scans have verified the historical and stored fault codes, and physical evidence confirms heavy carbon/fuel fouling on Cylinder #

Filed Oct 8, 2026 · Electrical, Engine · CA

The ECM harness was wired too close to a sharp metal piece within the engine bay, the clip MBZ uses to secure it was insufficient to hold it back, the thick wiring harness got caught on the metal piece and overtime got cut deeply causing a short with thermal issues spreading to other components, the wiring harness melted together and caused so much heat in the engine bay that other components touching the thick wiring also have visible melt spots, if it wasn't caught because we got a shock from a metall component of the car and therefore realized there must be a short it could've potentially posed a fire risk.

Filed Jul 3, 2026 · Electrical · WA · fire

On January 19, 2026, my neighbors / daughter noticed smoke was coming from under the van that had been parked for over 3 hours. Shortly after, he confirmed the van had caught fire. I asked him to call the fire department.

Filed Mar 24, 2026 · MN

In August 2025, I had taken the van for a drive to charge things up, got home, put it in park and parked it in my driveway, which has a mild slope. ~ 30 seconds - 1 minute after me leaving the vehicle, it rolled backward out of the driveway, across a busy street and 1/4 into my neighbors yard. I was mortified, there is usually a lot of people walking their dogs, kids etc...and cars going by. The vehicle was stopped by the curb vs the 2nd back tire (Thie first one cleared the curb and was in my neighbors lawn. It ALMOST hit a BIG tree. I pulled it back into the driveway & checked it again, worried I may have somehow not put it in park, but it did it over and over again. Shortly after I put it in park and turned it off it "released" and started rolling spontaneously. I could have run over my neighbors; people, babies...pets, me... I piled logs and big rocks behind all 4 tires (put it park with the parking brake on of course,) & called the Mercedes dealer & made an appointment. I did not drive it again until it was "repaired," except for the fact that nothing showed up on the scanned as wrong. They kept if for 3 weeks but "it never did it again," & they "never found anything." They charged up the battery and said maybe it was because the battery got too low and that the chassis battery charges the transmission battery and maybe the transmission battery was low. They mentioned that they had had one other person come with the same problem. The local Winnebago dealership mentioned that they had had someone come in with the same complaint. With the vehicle unchanged after this potentially catastrophic event, how can I trust it? What happens if I am in it and it is parked on a slope and it does it again? What could happen if the transmission fails on the road? It was VERY SCARY. For a couple months I had a mini panic attack every time a young family walked by...what could have happened if they happened to be walking by when that happened. I will have to collect the info

Filed Nov 21, 2025 · Wheels · WA

2023 Sprinter van jack was pulled out for the first time to be used last week and found to be unsafe. The jack base is crowned in center, the edges flare upwards and large gouge/groove in metal base, causing the jack to noticeably wobble and rock in manner that it is unsafe to use, fear of jack tilting and dropping van onto user of jack. Jack base has obvious defects and unsafe to use. Have contacted dealer and referred to MBUSA who provided a case # and no resolution to provide a safe jack to replace the defective jack.

Filed Oct 1, 2025 · Engine, Fuel system · GA

I had tuned up my sprinter van around 64000 miles. I put new ngk spark plugs and ignition coils on it. Ran for a day then. The codes said the number one ignition coil was bad. Change that out and it ran for about 8000 miles. Then stated to go in lymph mode again. I decided to replace them with original Mercedes spark plugs and Ignition coils. But when I put them in the van had no power and was jerking. It was doing this before I changed them out. It had no power and would barely go up a hill. I researched and seen certain Merecedes Sprinter vans from 2021 to 2023. Had a recall on the fuel pump. But I don't understand why my van wasn't included. It's showing all the systems them the fuel pump or something to do with the fuel pump is going bad. I changed the spark plugs and ignition coils twice in less than 3 months.

Filed Aug 30, 2025 · Engine, Fuel system · OK

In Colorado. Vehucle has no response when pushing on the gas pedal. Dead pedal at a light in Gunnison and now again at my home at 9,450 ft.

Filed Jul 15, 2025 · Engine, Fuel system · NV

Occasionally, the idle speed of the engine will drop to 400 rpm. When this happens, the vehicle does not respond to throttle input. If it happens in a parking lot, you can shift into park and coax the rpm higher, then shift to drive and move on. When it happens in the middle of an intersection while waiting to make a left turn, the story is very different. You can end up in a very dangerous situation. This has happened to me multiple times. I have not had an accident, but I have upset other drivers when I failed to clear an intersection in a timely manner. Knowing that the car will move when you press on the accelerator is critical for safely operating a vehicle. I purchased the vehicle new in October 2024, but did not start driving it until February 2025. The first incident happened about a week after hitting the road. It has happened many times since then. It took me an embarrassingly long time (months) to realize the problem was a low idle. The symptom I observed was that the vehicle failed to respond to the accelerator. That is the symptom that people will notice and that is the symptom that should be matched. It can be scary when it happens. Now that I know that it is brought on by low idle, I can watch for it and be prepared, but it can still leave me in a bad situation.

Filed Nov 24, 2024 · Transmission · CA

My front driveshaft is backing out of both the front differential and the transfer case. This could detach, and potentially take out fuel, brake, and electrical lines (poss. incl. Electric Steering). And cause full loss of drive power. MBZ reportedly has an internal TSB but has not issued a recall. There are MANY similar reports at [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 9, 2024 · OR

Mercedes issued a recall. They placed a stop shipment on the van. They do not have parts to repair it........