2017 Mercedes-Benz E300: check engine light

Filed Aug 4, 2026 · Engine · CA

My vehicle has about 68k miles, while driving on freeway all of sudden the car engine started to shake and check engine light came on dashboard. This engine shaking would stop when vehicle was being driven at high speed. Upon returning home I checked the DTC codes and had P300, P301 engine misfire codes. My mechanic suggested to have spark plugs and Ignition coil#1 to be changed. I bought new plugs from dealer for the replacement. When my mechanic completed this repair bit noticed vehicle still had misfire. He conducted compression test and found only 20PSI pressure is cylinder 1 and suggested a tear-down or engine replacement. I talked to another shop and described the issue and was informed that this is a common issue in Mercedes E300 to develop misfire in either cylinder 1 or 2. I found similar issues described by many owners on various forums online as well. Currently Mercedes has no recall for this issue.

Filed May 14, 2025 · Engine, Transmission · MD

Mercedes-Benz E300 is affected by a Transmission Control Module (TCM) recall, you might notice these symptoms: - Delayed or rough shifting: The transmission may hesitate or struggle to change gears. - Slipping gears: The car might unexpectedly shift out of gear or fail to stay in the correct gear. - Unresponsive transmission: You may experience difficulty accelerating or feel like the car is stuck in a lower gear. - Warning lights: The check engine or transmission warning light may illuminate on the dashboard. - Limp mode activation: The vehicle may enter a fail-safe mode, restricting speed and performance to prevent further damage.

Filed Oct 11, 2024 · Engine, Fuel system · VA

malfunctioning positive crankcase ventilation (PCV) valve: Issue: The partial-load ventilation valve in the intake line assembly does not work as intended, causing the check engine light to come on. Recommended action: the intake line assembly may need to be replaced. A malfunctioning positive crankcase ventilation (PCV) valve can cause a number of engine issues, including: Increased oil consumption, Leaks, Reduced fuel efficiency, and The engine releasing more pollutants.

Filed Jul 23, 2024 · Engine, Transmission · 85,000 miles · NY

The contact owns a 2017 Mercedes-Benz E300. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that the check engine warning light illuminated. Additionally, the contact stated that when the gear shifter was shifted into reverse, there was an abnormally loud sound coming from the transmission. The contact turned off and restarted the vehicle and the vehicle had self-corrected the issue. The vehicle was taken to an independent mechanic where it was diagnosed with solenoid failure in the valve body. The contact was informed that the solenoid needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was filed. The contact was advised to contact the federal safety agency Hotline to report the failure. The failure mileage was approximately 85,000.

Filed Jul 3, 2024 · Engine, Fuel system · 72,000 miles · CA

The contact owns a 2017 Mercedes-Benz E300. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. Additionally, the vehicle stalled, and the engine misfired. The contact stated that the check engine warning light was illuminated. The vehicle was taken to the dealer where it was diagnosed with failed fuel injectors and failed fuel rail. The contact was informed that the fuel injectors and the fuel rail needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 72,000.

Filed Apr 20, 2024 · Engine · MA

PCV FAILURE causes engine light code and emission problem

Filed Apr 5, 2024 · Engine · MD

Check engine light came on and then complete engine failure. Cracked #1 piston, and engine destroyed.

Filed Nov 2, 2023 · Engine · WA

Piston failure at 62000 miles. No prior engine lights until it happened suddenly while driving at the highway speed. The car suddenly lost power and started to violently shake and the engine light came on. Was able to pull over without incident and consult MB before bringing for diagnostics. There's a lot of MB with this specific engine piston failure affected according to internet search. The car has been inspected by the MB service dealer confirming piston failure. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 3, 2023 · Engine · 82,000 miles · CA

The contact owns a 2017 Mercedes-Benz E300. The contact stated while coming to a stop, the vehicle shuddered. The check engine warning light was illuminated. The contact stated while accelerating from the complete stop, the vehicle hesitated to respond. The contact was able to continue driving at a slower speed. The contact stated that the failure had been recurring while driving and the vehicle failed to exceed 60 MPH. The vehicle was taken an independent mechanic, where the spark plugs, ignition coils, and the fuel injectors were replaced; however, the failure persisted. The mechanic determined that there was low compression on cylinder #1, and that the engine needed to be replaced. The vehicle was not repaired. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 82,000.

Filed Jul 27, 2023 · Engine · CA

Car will loose power unexpectedly and start shaking badly. Check engine light comes on flashing. Vehicle gets towed to shop to find loss of compresión on cylinder one. Mercedes Benz forums full of this type of issue. Shop says repair is to rebuild or replace engine. Vehicle available for inspection.

Filed May 26, 2023 · Engine · CA

Having a Mercedes was my dream since I was a kid and I’m completely heartbroken to have to file this complaint. I’ve been working literally my whole life to finally be able to afford my 2017 E300. I purchased it from Autobahn Motors in Belmont, California in August 2020. My car has ~48,000 miles on it and I still own approximately $14,000 on the car as of today (5/20/2023). When I was driving on the highway my car engine light came on, started to violently shake, and I thought it was going to stall out. I immediately took it in to my mechanic and he told me that piston #1 is broken and the spark plugs are melted! Premature engine failure. I can no longer use my car until I get my engine replace! I’ve gotten one quote and it is approximately $15,000! I don’t even have 50,000 miles on my car. I saw a large volume of complaints online for the M274 engine including a class action lawsuit that have exactly the same issue as what my mechanic diagnostics is showing (broken piston #1 leading to premature engine failure). This is a huge safety concern and needs to be investigated immediately and corrected by Mercedes Benz before someone gets hurt or dies from this failure. For the price I’ve paid, still owe, as well as what the repair would be is completely unacceptable. I need my car for work and I’m also a parent so this is creating a huge inconvenience and financial hardship. Mercedes must be aware of this problem and held accountable for there negligence on correcting this issue.

Filed Feb 8, 2023 · Engine · NJ

have engine light on, and error code p052, which is a PVC malfunction. It is a common issue happens to a lot of MB owners. Mercedes Benz refuses to have the replacement covered by extended warranty.