Engine
3.5L 6-cyl
How to read this file. Complaint records are unverified owner submissions to the federal safety agency. Counts are raw, not adjusted for sales volume or vehicle age. Recall campaigns apply to the model; only a VIN check shows whether this car is affected or repaired. Parts shown are named by an editorial note or listed as a search directory; none is a diagnosis. Full methodology.
Fault profile
Complaint-component records on this vehicle, grouped by family. A complaint naming two systems counts once in each.
Complaints are owner-reported and not verified by the agency.
When it fails
The timing of this vehicle's reported failures, from the complaint file itself. A cluster tells you what to expect and when; it is shaped by reporting behavior as well as by the vehicle.
Vehicle age when the failure occurred
Years between the model year and the owner's reported failure date. Based on 68 of 68 complaints with a usable failure date.
Odometer when the failure occurred
Owner-reported mileage at failure, in 20,000-mile bands. Based on 33 of 68 complaints reporting a plausible odometer (500 to 500,000 miles; unverified).
Known issues
The component families with the most complaint records against this vehicle. Counts, crash and fire figures belong to the whole family, not to any single named issue. Parts listed are related system parts, not a diagnosis.
Electrical system
20 complaint records
"Other that other 2014 ml350 have a recall for oil leaking from the reserve. Seems like my vehicle is affected by this issue as well, oil leak when low..."- one owner's federal complaint about this system; it may not describe the issue named above
Parts
No specific part is named for this issue. Browse electrical system parts in the directory →
Engine & cooling
17 complaint records
"The seals on oil cooler fail which causes leaks Oil dropping on roadway or oil leaking in engine compartment can cause a fire...."- one owner's federal complaint about this system; it may not describe the issue named above
Parts
No specific part is named for this issue. Browse engine & cooling parts in the directory →
Fuel system
11 complaint records
"DIESEL FUEL FILTER AND/OR DIESEL FUEL HOSE LEAKS SPILLING HIGHLY FLAMMABLE DIESEL FUEL ON THE ROAD. THE DIESEL FUEL COULD LEAK NEAR THE HEAT SOURCE OR LEAK ONTO THE ROAD. THIS COULD LEAD TO A CRASH OR CAUSE A FIRE IN THE PRESENCE OF AN IGNITION SOURCE...."- one owner's federal complaint about this system; it may not describe the issue named above
Parts
No specific part is named for this issue. Browse fuel system parts in the directory →
Recall campaigns
Safety-recall remedies are normally provided at no charge. Under US federal law the mandatory free remedy applies when the vehicle was no more than 15 years old at the time the defect was determined; manufacturers often cover older vehicles voluntarily. Canadian rules differ. Confirm eligibility with the manufacturer using the VIN. Each campaign number links to the federal record.
| Campaign | Component | Summary | Remedy |
|---|---|---|---|
| 22V955000 | Fuel System, Gasoline | Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012-2014 ML550, 2012-2015 ML350, AMG ML63, 2015 ML250, ML400, 2016 GLE450, GLE300, 2016-2018 GLE350, GLE550, 2016-2019 GLE400, 2017-2019 AMG GLE43, and 2016-2020 AMG... | Normally free |
| 19V787000 | Communication | Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2013-2017 vehicles due to a software fault that may cause the date and time for the emergency call system (eCall) to differ from the actual date and time, potentially... | Normally free |
| 18V272000 | Suspension | Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012-2014 ML350 Bluetec 4Matic and ML550 4Matic, 2012-2015 ML63 AMG 4Matic and ML350 4Matic, 2013-2016 GL350 Bluetec 4Matic, GL550 4Matic and GL63 AMG 4Matic, 2017... | Normally free |
| 17V177000 | Electrical System | Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 AMG GT-S, GLC300, CLA250 and GLE300d 4Matic vehicles, 2013 C250, E350 BlueTec and G63 AMG vehicles, 2008-2014 C300 vehicles, 2013-2014 C300 4Matic and ML350... | Normally free |
Service bulletins and warranty extensions
Manufacturer communications to dealers on file with the federal agency: repair instructions, service campaigns, and warranty extensions. A warranty extension means the manufacturer may pay for a repair the recall table does not cover.
| Bulletin | Type | Component | Summary |
|---|---|---|---|
| EW - HVAC Service Oct 2020 | WARRANTY EXTENSION | Visibility/Wiper | This NCU replaces the prior NCUs issued on May 18, June 25, 2020 and October 1, 2020 and contains important workshop instructions on how the HVAC Service Warranty repair must be carried out. |
| EW - Pressure Sensor Nov 2020 | WARRANTY EXTENSION | Engine | Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2012-2016 Mercedes-Benz Model 212, 221, X204 and 166 vehicles (E250 BLUETEC, E250 4MATIC BLUETEC, E350 BLUETEC, S350 4MATIC BLUETEC, GLK250 4MATIC BLUETEC,... |
| EW - BlueTEC Update Oct 2021 | WARRANTY EXTENSION | Engine | Mercedes-Benz USA, LLC will provide an Extended Modification Warranty for each vehicle that has received the Approved Emission Modification. |
| EW - PM Sensor Oct 2023 | WARRANTY EXTENSION | Engine | This NCU replaces the prior NCU issued on August 19, 2022, and removes specific fault codes list. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) vehicles listed below, the particulate matter (“PM”) sensor... |
| LI42.10-P-078779 Sep 2026 | Service Brakes | Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. |
Show 55 more bulletins
| Bulletin | Type | Component | Summary |
|---|---|---|---|
| LI82.62-P-078631 Sep 2026 | Structure | 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. | |
| LI46.35-P-067339 Aug 2026 | Steering | 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). | |
| LI82.62-P-078631 Aug 2026 | Structure | 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. | |
| LI35.30-P-058566 Jul 2026 | Power Train | 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. | |
| LI33.20-P-078406 Jul 2026 | Suspension | Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. | |
| LI82.85-P-080507 May 2026 | Electrical System | 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. | |
| LI33.20-P-078406 May 2026 | Suspension | Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. | |
| LI82.10-P-078301 Apr 2026 | Exterior Lighting | Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. | |
| LI82.10-P-078301 Mar 2026 | Exterior Lighting | Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. | |
| LI82.10-P-078307 Feb 2026 | Exterior Lighting | Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. | |
| LI82.10-P-078896 Feb 2026 | Exterior Lighting | Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. | |
| LI82.10-P-078301 Feb 2026 | Exterior Lighting | Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. | |
| LI33.30-P-056665 Nov 2025 | Power Train | Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). | |
| LI27.19-P-074985 Jul 2025 | Electrical System | Complaint Commissioning not possible after replacement of TRANSMISSION 722.9 or of electrohydraulic controller unit (EHS) or of repair kit controller unit (VGS). | |
| LI82.85-P-079271 May 2025 | Electrical System | Complaint After a software update of HERMES communication module N112/9 has been performed on a gray import vehicle, the message "SOS - Service not activated" is displayed in the instrument cluster. | |
| LI33.30-P-056665 May 2025 | Power Train | Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). | |
| LI82.10-P-078301 Apr 2025 | Exterior Lighting | Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. | |
| LI82.10-P-078896 Apr 2025 | Exterior Lighting | Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. | |
| LI83.20-P-051802 Apr 2025 | Engine | Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir (not visible), reducing the coolant flow in the heater heat exchanger (see picture). | |
| LI82.70-P-077433 Mar 2025 | Electrical System | Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly difficult to understand as the speed rises. Cause A. | |
| LI33.20-P-078406 Jan 2025 | Suspension | Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements. Sound file attached for comparison. NOTE: Steering functionality is not affected. For 192 and 232: Only affects vehicles in the below FIN range. | |
| LI88.60-P-072093 Jan 2025 | Structure | Complaint Fuel door may require several attempts to open. Please note that if the complaint "Fuel filler flap not opening" occurs, it is important to check the fuel filler flap before replacing the central locking actuator. | |
| LI72.10-P-069496 Jan 2025 | Electrical System | Complaint Windows of the front doors poorly adjusted/sluggish Cause The settings of the front windows may be set incorrectly Remedy Adjustment of the windows or window guides as specified in AR72.10-P-1960GQS . | |
| LI33.30-P-056665 Jan 2025 | Power Train | Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). | |
| LI54.65-P-066284 Jan 2025 | Electrical System | Complaint The flap of the reversing camera opens and closes by itself during forward travel several times during the trip. No camera image is displayed in the head unit. | |
| LI35.30-P-058566 Jan 2025 | Power Train | Complaint 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. | |
| LI54.65-P-066284 Nov 2024 | Electrical System | Complaint The flap of the reversing camera opens and closes by itself during forward travel. This happens several times during the trip. The customer notices the sound of opening and closing. No camera image is displayed in the head unit. | |
| LI33.20-P-078406 Nov 2024 | Wheels | Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements. Sound file attached for comparison. NOTE: Steering functionality is not affected. | |
| LI82.85-P-078473 Nov 2024 | Electrical System | Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital Extras (previously Mercedes me) cannot be activated. The DTC B15CE00 is active or active+saved. | |
| LI27.19-P-072588 Nov 2024 | Power Train | Complaint Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick test and/or no communication possible with VGS. | |
| LI82.10-P-078069 Nov 2024 | Visibility/Wiper | Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any technical impairment of the rear lamps. | |
| LI82.35-P-078467 Oct 2024 | Structure | Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump. 3.1. Distributor housing leaks. 3.2. Pump fitting leaks. 3.3. | |
| LI82.85-P-078473 Oct 2024 | Electrical System | Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital Extras (previously Mercedes me) cannot be activated. The DTC B15CE00 is active or active+saved. | |
| LI82.70-P-077433 Sep 2024 | Electrical System | Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly difficult to understand as the speed rises. Cause A. | |
| LI33.20-P-078406 Sep 2024 | Suspension | Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements. Sound file attached for comparison. NOTE: Steering functionality is not affected. | |
| LI82.10-P-078307 Sep 2024 | Exterior Lighting | Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. | |
| LI82.10-P-078301 Sep 2024 | Exterior Lighting | Complaint Headlamp or front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. Headlamps comply with all applicable standards. | |
| LI82.10-P-078302 Sep 2024 | Exterior Lighting | Complaint Headlamps fogged or droplets forming. Cause Due to its outlet openings, the headlamp is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate into the headlamp. | |
| LI82.10-P-078304 Sep 2024 | Exterior Lighting | Complaint Headlamps fogged or droplets forming. Cause Due to the housing cover with pressure compensation diaphragm, the headlamps are a "closed system". This means that the headlamps are protected against acid gases, dirt and exhaust gas. | |
| NCU - 2022080005 Aug 2024 | SERVICE CAMPAIGN | Electrical System | Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) C-Class, E-Class, S-Class, G-Class, CL, CLS, ML, GL, GLE, GLS, GLC, SL, and AMG GT (204, 205, 207, 212, 213, 217, 221, 222, 463, 216, 218, 166, 292, 253, 231,... |
| CL - 2022080005 Aug 2024 | Electrical System | In our continuing efforts to ensure the proper performance and quality of your vehicle, we are writing to inform you that on certain Model Year 2011-2018 C-Class, E-Class, S-Class, G-Class, CL, CLS, ML, GL, GLE, GLS, GLC, SL, and AMG GT vehicles with 6 and 8 cylinder gasoline... | |
| LI82.10-P-078069 Jul 2024 | Exterior Lighting | Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any technical impairment of the rear lamps. | |
| LI91.18-P-077075 Dec 2023 | Seats | Crease formation on genuine leather seat covers in vehicles with low mileage ⢠Objects left on the seats for extended periods of time (pressure marks). ⢠Objects wedged between the seat backrest and seat cushion (e.g. seat belt buckle). | |
| CL-Exhaust Valve Assembly Sep 2023 | Engine | In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA ("MBUSA") is extending the coverage for the exhaust valve assembly on your vehicle as follows: Why the warranty extension? | |
| CL- PM Sensor Sep 2022 | Engine | The purpose of this letter is to advise you of additional benefits that Mercedes-Benz USA, LLC ("MBUSA") is providing to you regarding your vehicle ownership. | |
| ELW-PM Sensor Aug 2022 | Fuel System | Mercedes-Benz AG (âMBAGâ), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (âMYâ) vehicles listed below, the particulate matter (âPMâ) sensor could potentially fail and consequently activate the malfunction indicator light (MIL)... | |
| LI82.20-P-073063 Feb 2022 | Interior Lighting | Complaint The touchpad dimming function does not work and the search lighting is either at maximum brightness or fully off (dependent upon dimming signal). Note: The dimming functions of the instrument cluster and head unit display are not affected and remain fully functional. | |
| LI8220P073063 Jun 2021 | Interior Lighting | Touch pad: Search lighting does not dim or does not turn on. | |
| Launch NCU - 202 Jan 2021 | Electrical System | Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz, has determined that on certain Model Year (?MY?) 2013-2017 B-Class, C-Class, CLA-Class, CLS-Class, E-Class, G-Class, GL-Class, GLA-Class, GLC-Class, GLE-Class, GLK-Class, GLS-Class, GT-Class, M-Class, S-Class,... | |
| LI68.20-P-070037 Dec 2020 | Equipment | Armrest In Center Console (Front) Only Opens On One Side Or Not At All - Model Series 167 | |
| LI77.21-P-072113 Dec 2020 | Visibility | Creaking noise from fixed glass section of panoramic roof in area of rear passenger compartment grab handles | |
| NCU-2020070018 Nov 2020 | Engine And Engine Cooling | Mercedes-Benz USA, LLC (?MBUSA?) has entered into an agreement with the United States Department of Justice (DOJ), the Environmental Protection Agency (EPA), the California Air Resources Board (CARB), and the California Attorney General?s Office (CA AG) regarding the emission... | |
| NCU-2020110011 Nov 2020 | Engine And Engine Cooling | Mercedes-Benz USA, LLC (?MBUSA?) has entered into an agreement with the United States Department of Justice (DOJ), the Environmental Protection Agency (EPA), the California Air Resources Board (CARB), and the California Attorney General?s Office (CA AG) regarding the emission... | |
| CL-Pressure Sensor Nov 2020 | Engine | Dear Mercedes-Benz Owner: The purpose of this letter is to advise you of additional benefits that Mercedes-Benz USA, LLC (“MBUSA”) is providing to you regarding your vehicle ownership. | |
| Initial NCU MY13 Sep 2020 | Engine And Engine Cooling | Mercedes-Benz USA, LLC (?MBUSA?) has entered into an agreement with the United States Department of Justice (DOJ), the Environmental Protection Agency (EPA), the California Air Resources Board (CARB), and the California Attorney General?s Office (CA AG) regarding the emission... |
Showing 60 of 116 distinct bulletins on file for this vehicle.
Before you buy this vehicle
A test-drive checklist generated from this vehicle's own complaint and recall record.
- Sit in it with the engine off and test everything that has a switch.Windows, locks, lights, the cluster, the radio. Electrical faults are this vehicle's story and the hardest to see on a drive: an intermittent no-start waits for the second week of ownership. Ask for the battery's age and whether any control module has been replaced.
- Cold-start it yourself and listen for the first thirty seconds.Knocking, ticking that fades as it warms, or blue or white smoke on startup are the sounds of this vehicle's engine cluster. Check the oil level and the coolant color, and ask whether the engine or its head gaskets have ever been out.
- Smell for fuel and watch the first restart when hot.Hard starting when warm, hesitation under load, or any fuel odor near the tank or engine bay match this vehicle's fuel-system cluster. Check the recall table for fuel pump campaigns.
- Run the VIN against open recalls before you negotiate.This vehicle has 4 recall campaigns on file. An open recall needs VIN-specific confirmation. Many are quick, no-charge fixes and worth negotiating over; an unresolved do-not-drive advisory, or a remedy the manufacturer has not yet made available, should stop the purchase until it is resolved.
- Ask the dealer whether the warranty extension on file still applies to this VIN.The manufacturer issued 4 warranty extensions for this vehicle (see the service bulletins section). Extended coverage often runs by years or miles from the original sale, and a repair the seller paid for may have been free.
- Ask for the service history in writing, then read it against this page.The complaint families above are where owners of this vehicle report trouble. Repairs in exactly those systems are evidence the car had the problem; no such repairs could mean it never developed it, or that it was never fixed. The test-drive items above are how you tell those apart.
Parts search directory
The generic parts list for this vehicle has its own page: a search launcher for every system, filtered by fuel type and era but not by engine, trim, or brake type. It is not a diagnosis and not a fitment guarantee.
Open the parts directory for this Mercedes-Benz Ml350 →