2014 Mercedes-Benz C300 problems, complaints & recalls
Most-reported problem areas: Air Bags (47) · Steering (10) · Suspension (8)
🧭 Reliability snapshot
Compared against other Mercedes-Benz C300 model years — complaint volume vs the model's median year, recalls and severity. How we score →
🛣️ Complaints by mileage
21 NHTSA complaints that reported an odometer reading.
Safety recalls (5)
Communication 2019-11-01 · campaign 19V787000 · 24,226 vehicles
Defect: 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 relaying an inaccurate vehicle location. For a full list of the affected models visit: https://static.nhtsa.gov/odi/rcl/2019/RMISC-19V787-4620.pdf
Risk: An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
Fix: MBUSA has initiated an Over the Air (OTA) remote update. MBUSA will also notify owners, and dealers will check software for a successful OTA or update the communication module software as needed, free of charge. The recall began December 23, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019120008.
Air Bags:frontal:passenger Side:inflator Module 2019-01-09 · campaign 19V010000 · 288,779 vehicles
Defect: 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, C63 AMG Coupe, GLK 350, GLK250 BlueTec 4Matic, GLK350 RWD, 2015-2017 E400 4Matic Coupe, E400 Cabrio, E400 Coupe, 2014-2017 E550 Cabrio, and 2014-2016 E550 Coupe vehicles sold, or ever registered, in the states of AL, CA, FL, GA, HI, LA, MS, SC, TX, PR, AS, GU, the MP, and VI or "Z
Risk: An inflator explosion may result in sharp metal fragments striking the passenger or other occupants resulting in serious injury or death.
Fix: MBUSA will notify owners, and dealers will replace the passenger frontal air bag module, free of charge. The recall began March 29, 2019. Owners may contact MBUSA customer service at 1-800-367-6372.
Air Bags:frontal 2017-10-06 · campaign 17V627000 · 495,290 vehicles
Defect: 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 4Matic, E550 4Matic, 2013-2014 C63 AMG, 2012-2015 C250 Coupe, C350 Coupe, C63 AMG Coupe, 2013-2015 C350 4Matic Coupe, GLK250 4Matic BlueTec, GLK350, GLK350 4Matic, 2016-2017 C350e, C43 AMG, 2015 C400 4Matic, 2016-2018 C63 AMG, GLC300, GLC300 4Matic, 2017-2018 C300 Coupe, C300 4Matic Cou
Risk: If the driver air bag inadvertently deploys, it can increase the risk of injury and a crash.
Fix: MBUSA will notify owners, and dealers will add sufficient grounding to the steering components, free of charge. The recall began in December 6, 2017. Owners may contact MBUSA customer service at 1-877-496-3691.
Steering 2017-04-12 · campaign 17V252000 · 168 vehicles
Defect: Mercedes-Benz USA LLC. (MBUSA) is recalling certain 2013-2014 C250, C300 4MATIC, GLK250 4MATIC BLUETEC and GLK350 vehicles, 2013 C250 Coupe, C350, C350 4MATIC Coupe, C350 Coupe and C63 AMG Coupe vehicles, and 2013-2015 GLK350 4MATIC vehicles. The steering coupling connecting bolt may have been insufficiently tightened, possibly resulting in a loss of steering.
Risk: A loss of steering can increase the risk of a crash.
Fix: MBUSA will notify owners, and dealers will inspect the steering coupling connecting bolt, tightening it as necessary, free of charge. The recall began May 2017. Owners may contact MBUSA customer service at 1-800-367-6372.
Electrical System:software 2017-03-14 · campaign 17V177000 · 51 vehicles
Defect: 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 4Matic vehicles, 2009 C350 vehicles, 2014 CLS550, E350 4Matic, E350 Coupe 4Matic, E350 Wagon 4Matic, GLK350 and SL550 vehicles, 2012 CLS550 4Matic vehicles, 2012-2016 E350 vehicles, 2016-2017 GL450 4Matic vehicles, 2012-2014 ML350 4Matic BlueTec vehicles, 2015 S550, S550 4Matic and C30
Risk: If the air bags do not deploy as intended in the event of a crash, there would be an increased risk of injury in the event of a crash.
Fix: MBUSA will notify owners, and dealers will update software in the affected control units, free of charge. The recall began April 21, 2017. Owners may contact MBUSA customer service at 1-800-367-6372.
Service bulletins (103)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Service Brakes 2026-09-22 · LI42.10-P-078779 · Service Bulletin/Repair Instructions
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. cause although the cause of the vibra
Structure:body 2026-09-14 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
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. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Structure:body 2026-08-06 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
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. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Power Train 2026-07-14 · LI35.30-P-058566 · Service Bulletin/Repair Instructions
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. note: sound file in attachment cause if the complaint is eliminated by experimentally loosening the outboard collar n
Suspension 2026-07-07 · LI33.20-P-078406 · Service Bulletin/Repair Instructions
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. must match noise for proper diagnos
Visibility/Wiper 2026-05-19 · LI82.30-P-059239 · Service Bulletin/Repair Instructions
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 windshield from the a-pillar
Showing the 6 most recent of 103 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-02-23 · Steering“experiencing a failed electronic steering lock (esl). car won’t crank or start even after verifying battery health and key fob. symptoms point to a failed esl, left stranded…”
2025-09-11 · Seats“leaving my home from my driveway and driving about 15 feet i heard a loud pop from my backseat area and noticed my headrest on drivers side deployed without any reason. the airbag right/left malfunction light showed on my dash saying service required. mercedes benz dealership said they never heard of this. the dealership removed old headrest and r…”
2025-02-05 · Suspension“the left rear subframe separated from the main frame causing the car to pull to the left when braking. i had an episode where i was stopping for a traffic light and the car started fishtailing and i almost lost control of the car. following this episode, i took the car to a mechanic who advised me that the car was unsafe to drive. my mechanic a…”
2025-01-20 · Steering“ to whom it may concern, i am seeking assistance regarding my 2014 mercedes-benz c-300, vin [xxx] . i repurchased this vehicle from the london nissan dealership on [xxx]. it currently has about 120,000 miles, and i have driven an additional 15,000 miles in the past two years. less than three months after purchase, i took the car to a mercedes-ben…”
2024-11-07 · Steering“it's the esl electric steering lock this part is known to be defective and is posted online to fix and also bypass it. i am not a mechanic so i am told part alone is $570 at mercedes they have to program it. this part is know to break and only they can reprogram it. this should be a safty issue. the car rtdoes not start because of it and it locks t…”
2024-11-06 · Steering · 158,000 mi“the contact owns a 2014 mercedes-benz c300. the contact stated that an unidentified recall was previously completed on the vehicle; however, the recall remedy failed to prevent the failure from occurring. the contact stated that while driving at undisclosed speeds, the steering wheel locked. no warning light was illuminated. the vehicle was towed t…”
2024-08-27 · Suspension“rotted rear sub frame due to poor design retaining water…”
2024-08-20 · Structure:body“i purchased my vehicle from the mercedes benz dealership and received a recall letter in the mail stating that driver side deployment may occur. after receiving notice i brought the car to the dealership to get the recall repaired. i've been driving around with a false sense of security believing that this issue was repaired. however, recently, w…”
2024-07-02 · Steering“while i was driving my car the driver side airbag abruptly deployed. the airbag inadvertently deployed; the car did not crash into anything to cause the airbag to deploy. when the airbag erupted it caused injury to my head, face, hand, arm and wrist. i believe the airbag is defective because i have lacerations on my face possibly due to sharp objec…”
2024-06-28 · Structure:body:door:handle:interior“the driver's side interior door handle became disengaged as i was trying to open the door so i was momentarily trapped inside. if i had been in a situation where i had been in an accident and needed to get out quickly, or the car had been on fire, or i was stalled on the train tracks, this could have been a serious incident. when i googled this, …”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.