Engine
3.0L 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 266 of 266 complaints with a usable failure date.
Odometer when the failure occurred
Owner-reported mileage at failure, in 20,000-mile bands. Based on 73 of 266 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.
Air bags
115 complaint records3 crash reports
"I HAVE AN AIRBAG RECALL THAT THE DEALER KEEPS PUTTING OFF. I UNDERSTAND THIS IS A DANGEROUS RECALL AND I NEED TO GET IT FIXED! *TR..."- 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 air bags parts in the directory →
Suspension
70 complaint records
"Corroded rear cradle driver side. Causing instability driving. Cradle on back order for months according to local Mercedes parts department..."- 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 suspension parts in the directory →
Body & structure
54 complaint records
"Rare Subframe breaking off parts are not available for at least 6 months. I have kids and mechanics advise me to keep it off the road. My only means of transportation..."- 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 body & structure parts in the directory →
Federal defect investigations
Formal investigations opened by the federal safety agency into this vehicle. An investigation is the step between a complaint pattern and a recall; not every one results in one.
| Investigation | Status | Component | Subject |
|---|---|---|---|
| EA21002 opened Sep 2021 | OPEN | Air Bags | Desiccated Air Bag Inflator Rupture From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. |
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 |
|---|---|---|---|
| 20V298000 | Air Bags | Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012 C250, C250 Coupe, C300, C350, C350 Coupe, C63 AMG, and C63 AMG Coupe vehicles equipped with a front passenger air bag assembly replaced under a prior recall. | Normally free |
| 19V010000 | Air Bags | Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2014 C250, C300 4Matic, C350, C63 AMG, E350 4Matic Coupe, E350 Cabrio, E350 Coupe, SLS AMG Cabrio, SLS AMG Coupe, 2014-2015 C250 Coupe, C350 4Matic Coupe, C350 Coupe,... | Normally free |
| 17V627000 | Air Bags | Mercedes-Benz USA, LLC. (MBUSA) is recalling these vehicles: 2014-2018 CLA250, CLA250 4Matic, CLA45 AMG 4Matic, 2015-2018 GLA250, GLA250 4Matic, GLA45 AMG 4Matic, C300 4Matic, C63S AMG, 2012-2014 C250, C350, C300... | 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 |
| 17V017000 | Air Bags | Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2012 C300 4Matic, C250, C250 Coupe, C350, C350 Coupe 4Matic, C350 Coupe, C63 AMG, C63 AMG Coupe, E350 Coupe 4Matic, E350 Cabrio, E350 Coupe, E550 Cabrio, E550 Coupe,... | Normally free |
| 12V557000 | Fuel System, Gasoline | Mercedes-Benz is recalling certain model year 2011-2012 S400, S550, S550 4Matic, S63 AMG, C300, C300 4Matic, E350, GLK350, GLK350 4Matic, CL550 4Matic, and CL63 AMG vehicles manufactured from April 18, 2011, through... | 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. |
| 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. | |
| 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. | |
| 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. |
Show 55 more bulletins
| Bulletin | Type | Component | Summary |
|---|---|---|---|
| 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. | |
| LI82.30-P-059239 May 2026 | Visibility/Wiper | Complaint There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper blades squeaking, chattering, shuddering B: The windshield is not wiped completely (streaking) C: During the downward movement water is pulled back onto the... | |
| LI35.10-P-078931 May 2026 | Suspension | Complaint Potential corrosion on the rear axle carrier Cause Due to market-specific conditions such as moisture, ingress of dirt and/or environmental influences, corrosion can occur on the rear axle carrier Remedy In the event of a complaint, the optimized repair method must be... | |
| 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-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). | |
| 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. | |
| LI82.85-P-079087 Apr 2025 | Electrical System | Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search 3.IP Radio 4.Send2Car 5.Speech Detection Service 6.E-Navigator 7.iHeartRadio 8.Traffic Cams Cause... | |
| LI35.10-P-078931 Apr 2025 | Suspension | Complaint Potential corrosion on the rear axle carrier Cause Due to market-specific conditions such as moisture, ingress of dirt, and environmental influences, corrosion may be present on the rear axle carrier Remedy In the event of a complaint, the optimized repair method must... | |
| 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. | |
| 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). | |
| 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. | |
| 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. | |
| LI27.00-P-074450 Oct 2024 | Power Train | Complaint Tension-releasing impact of the propeller shaft with the force-free in D "KID" function, after vehicle has stopped. Cause The tension-releasing jolt in the drivetrain originates as a result of the "release" of energy stored when braking through the force-free switch... | |
| 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. | |
| 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. | |
| 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. | |
| NCU - 24240304 Mar 2024 | Structure | As previously reported, to enhance the satisfaction of our customers, avoid further costs of litigation and return focus to its core businesses, Mercedes-Benz USA, LLC (MBUSA) has entered into a Settlement regarding claims relating to allegations that the 590 Mars Red paint... | |
| 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-ELWSubframe Mar 2023 | Equipment | Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 20 years/unlimited miles, and applies to the vehicle regardless of ownership. | |
| ELW-RearSubframe Mar 2023 | Equipment | Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 20 years/unlimited miles, and applies to the vehicle regardless of ownership. | |
| ELW-RearSubframe Feb 2023 | Structure | Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 20 years/unlimited miles, and applies to the vehicle regardless of ownership. | |
| LI68.05-P-060306 Jan 2022 | Electrical System | Complaint The garage door hand transmitter cannot be initialized with the integrated garage door opener in the inside rearview mirror. Cause 1. The integrated garage door opener (GDO) is not compatible with the opening system installed in the garage. 2. | |
| LI68.05-P-060307 Jan 2022 | Electrical System | Complaint The range of the integrated garage door opener (GTO) is too short. Cause 1. Vehicles equipped with infrared windows and/or a heated windshield may suffer from complaints involving low transmission power. 2. | |
| LI4245P073405 Aug 2021 | Engine And Engine Cooling | After starting the engine, the instrument cluster shows the "EBD not available, diagnosis/test stand" message in yellow. | |
| LI54.30-P-072145 Dec 2020 | Electrical System | NTG5.5: Incorrect time shown on instrument cluster, COMAND display, and analog clock | |
| LI42.47-P-067502 Dec 2020 | Electronic Stability Control | If the customer brakes sharply from a speed of > 30mph, without ABS intervention, there is a single cracking noise from the area of the ESP hydraulic unit | |
| LI82.10-P-064766 Jun 2020 | Exterior Lighting | Lamp unit fogged or droplets forming. Due to the vent openings, the lamp unit is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate it. This can result in deposits on the diffuser and lens. | |
| NCU - HVAC Warra May 2020 | Equipment | To enhance the satisfaction of our customers, avoid further costs of litigation and return focus to its core businesses, Mercedes-Benz USA, LLC (MBUSA) has entered into a settlement regarding claims relating to alleged mold and mildew type odors originating from the HVAC system... | |
| LI33 30-P-056665 Aug 2019 | Equipment Adaptive/Mobility | Throttle lift-off clunking noises at drive shafts of front axle | |
| LI35 30-P-058566 Aug 2019 | Power Train | Throttle lift-off clunking noises at drive shafts of rear axle | |
| SC-2019040001 Apr 2019 | Engine | Update engine electronics (ME-SFI) control unit software | |
| LI91 45-P-066075 Jul 2018 | Seat Belts | Seat belt extender toothed rack sluggish or makes noises | |
| LI07 70-P-066276 Mar 2018 | Engine And Engine Cooling | Check Engine Light is on with DTC P030185/ P030685 for misfire cylinder 1 and 6. | |
| LI05 20-P-067123 Oct 2017 | Engine | Oil in engine wiring harness | |
| LI8210P0647661 Aug 2016 | Exterior Lighting | Headlamps fogged. | |
| LI8285P0581859 Aug 2016 | Equipment | "Anti-theft protection activated". | |
| RecallUpdate Feb 2016 | Air Bags | Recall Campaign announcement for Takata driver airbags. | |
| LI32.25-P-061137 Mar 2015 | Suspension | Clunking noise from front axle suspension strut or rear axle shock absorber on short strokes of the damper | |
| LI46.35-P-059989 Oct 2014 | Steering | Red display message in instrument cluster "Power Steering Malfunction - See Owner's Manual" | |
| LI91.10-P-048411 Jul 2014 | Seats | The pneumatic 4-way lumbar support fails. Lumbar support pockets cannot be filled up or they drain. | |
| LI91.10-P-059387 Jul 2014 | Seats | Noises from flat spring core in backrest | |
| LI91.25-P-059380 Jul 2014 | Seats | Pneumatic comfort systems with insufficient performance, entirely inoperative or leaky. |
Showing 60 of 102 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.
- Watch the airbag warning light through a full key cycle.It should light on start and go out within seconds. A light that stays on, or never lights at all, means the system needs attention. Run the VIN for inflator recalls specifically.
- Find the roughest road nearby.Clunks over bumps, a droning hum that changes when the car leans, or a corner that sits low are this vehicle's suspension complaints. Wheel bearings and control arm bushings lead the parts list.
- Walk the body slowly in daylight.Panel gaps, rust at the rockers and wheel arches, and cracked trim are this vehicle's structure complaints. Open and close the liftgate or trunk and look at the latch area.
- Run the VIN against open recalls before you negotiate.This vehicle has 6 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 1 warranty extension 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 C300 →