2009 Mercedes Benz C300 problems, complaints & recalls
Most-reported problem areas: Air Bags (156) · Steering (120) · Exterior Lighting (95)
🛣️ Complaints by mileage
353 NHTSA complaints that reported an odometer reading.
Safety recalls (8)
Engine And Engine Cooling:engine:engine Control Module (Ecu/Ecm):software 2022-03-18 · campaign 22V168000 · 22 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2010 E350, 2014 G550, 2008-2009 C300, 2008 C350, 2009 CLK550, 2007 SL550, SLK280, and 2008 SLK350 vehicles. Various control units may have been updated with incorrect software configuration during a service repair. This can result in various system failures, such as loss of drive power, reduced exterior lighting, or loss of dynamic control functions, including stability and traction control.
Risk: Various system failures, such as loss of drive power, reduced exterior lighting, or loss of dynamic control functions including stability and traction control, can increase the risk of a crash.
Fix: Dealers will update the software configuration on the affected control units, free of charge. Owner notification letters were mailed May 3, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022040003.
Air Bags:frontal:passenger Side:inflator Module 2018-01-10 · campaign 18V043000 · 132,167 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2013 C250, C250 Coupe, C350 Coupe 4Matic, C300 4Matic, C350, C350 Coupe, C63 AMG, C63 Coupe, E350 Cabrio, E350 Coupe, E550 Cabrio, E350 Coupe 4Matic, E550 Coupe, GLK350 4Matic, GLK250 Bluetec 4Matic, GLK350, SLS Coupe, SLS AMG GT Coupe, and SLS Roadster vehicles sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern
Risk: An inflator explosion may result in sharp metal fragments striking the driver 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. Mercedes issued an interim notification to owners on February 23, 2018. A second notice will be mailed when remedy parts are available. Owners may contact MBUSA customer service at 1-877-496-3691.
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.
Air Bags:frontal:passenger Side:inflator Module 2017-01-10 · campaign 17V017000 · 104,119 vehicles
Defect: 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, GLK350 4Matic, GLK350, SLS AMG Cabrio, and SLS AMG Coupe vehicles originally sold, or ever registered, in Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the
Risk: An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
Fix: MBUSA will notify owners, and dealers will replace the front passenger air bag modules, free of charge. Owners were sent an interim notification in March 2017. Second notices started going out in October 2018 and continue to be mailed as parts become available. Owners may contact MBUSA customer service at 1-877-496-3691
Air Bags:frontal:passenger Side:inflator Module 2016-05-26 · campaign 16V363000 · 258,163 vehicles
Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain model year 2008-2011 C300 Sedan, C300 4matic Sedan, C350 Sedan, C63 AMG Sedan vehicles, 2010-2011 GLK350, GLK350 4-Matic and E350 Coupe vehicles, 2011 SLS AMG, E350 Convertible, E550 Coupe and E550 Convertible vehicles originally sold, or ever registered, in Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin I
Risk: An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
Fix: MBUSA will notify owners, and dealers will replace the passenger frontal air bag modules, free of charge. Owners were sent an interim notification October 2016. A second notice will be mailed when remedy parts are available. Owners may contact MBUSA customer service at 1-877-496-3691.
Air Bags:frontal:driver Side:inflator Module 2016-02-11 · campaign 16V081000 · 711,159 vehicles
Defect: Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2009-2010 ML320 BlueTec 4Matic, GL320 BlueTec 4Matic and R320 CDI 4Matic, 2011 E350 Cabriolet and E550 Cabriolet, 2009-2011 ML350, ML350 4Matic, ML550 4Matic, ML63 AMG, and C63 AMG, 2010-2011 ML450 4Matic Hybrid, E350 Coupe, E350 4Matic, E550 Coupe, E550 4Matic, and E63 AMG, 2011-2012 GL350 BlueTec 4Matic and R350 BlueTec 4Matic, 2009-2012 GL450 4Matic, GL550 4Matic and R350 4Matic, 2007-2008 SLK280, SLK350, and SLK55 AMG, 2011-201
Risk: In the event of a crash necessitating deployment of the driver's frontal air bag, the inflator could rupture with metal fragments striking the driver or other occupants resulting in serious injury or death.
Fix: MBUSA will their notify owners, and Fiat Chrysler will notify the affected Chrysler owners. Dealers for the respective brands will replace the driver's frontal air bag module, free of charge. This recall began November 2016. Mercedes-Benz owners may contact MBUSA customer service at 1-800-367-6372 and Chrysler owners may contact Fiat Chrysler customer service at 1-800-853-1403.
Air Bags:frontal:sensor/Control Module-Inactive 2015-10-27 · campaign 15V711000 · 127,504 vehicles
Defect: Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2008-2009 C300 Sedan, C300 4Matic, C63 AMG, and C350 vehicles, and 2010 GLK350 and GLK350 4Matic vehicles. Due to a manufacturing error, the air bag control unit may corrode and cause the control unit to malfunction.
Risk: The malfunctioning air bag control unit may cause the air bags to unexpectedly deploy increasing the risk of injury and the possibility of a vehicle crash. Alternatively, the air bag control unit malfunction may cause the air bags to not deploy in the event of a crash necessitating air bag deployment, increasing the risk of occupant injury.
Fix: MBUSA will notify owners, and dealers will inspect the air bag control unit and replace it, as necessary, free of charge. Mercedes-Benz issued an interim notification to owners on December 23, 2015. The recall began on March 14, 2016. Owners may contact MBUSA customer service at 1-800-367-6372.
Exterior Lighting:tail Lights 2014-04-11 · campaign 14V177000 · 252,867 vehicles
Defect: Mercedes-Benz USA, LLC (Mercedes) is recalling certain model year 2008-2011 C300, C300 4Matic, C350, and C63 AMG vehicles manufactured January 26, 2007, through July 13, 2011. In the affected vehicles, a poor electrical ground connection may result in the dimming or failure of the tail lights.
Risk: Dimming or failure of the tail lights reduces the ability to warn other motorists of the driver's intentions of stopping or turning, increasing the risk of a crash.
Fix: Mercedes will notify owners, and dealers will replace the bulb holders if not previously updated and replace any corroded connectors, free of charge. The recall began on August, 18, 2014. Owners may contact Mercedes at 1-800-367-6372.
Service bulletins (110)
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.
Steering 2026-09-26 · LI46.10-P-080896 · Service Bulletin/Repair Instructions
complaint slight creaking noises when steering. cause noises may come from one or more sleeves of the horn contact plate. remedy remove the horn contact plate and check the sleeves for noise; see attached video. if necessary, apply lubricant to the sleeves.
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
Showing the 6 most recent of 110 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-05-08 · Exterior Lighting“i have messages on my instrument panel stating i have airbag malfunction going on i also have tail lights that are not working and after trying to replace the bulbs it still don't work so obviously it's the light bulb panel so i went and looked at recalls and says that these are all recalls on my car but that they were fixed. so i don't know why i…”
2026-03-12 · Electrical System · 217,000 mi“the contact owns a 2009 mercedes-benz c300. the contact stated that while starting the vehicle, the check engine, seat belt, and air bag warning lights illuminated. additionally, the headlights and navigation lights failed to activate for a while. there was burning odor inside the vehicle with the heat activated or turned off. the contact also stat…”
2025-10-12 · Structure:body“vehicle inspection by independent service center indicated that a new rear frame was necessary. this was the second communication to nhtsa on this issue. this automobile (2009 c300) is inoperable due to this mercedes rear frame defect .…”
2025-06-17 · Steering“the problem is that the steering wheel locking mechanism has failed. the vehicle could not be started or driven. it required a flatbed tow to an authorized mercedes repair facility. it was diagnosed as the steering mechanism, requiring replacement. the cost for this repair is $1400.00. i researched this problem on the mb website and it stated th…”
2025-03-06 · Electrical System“while driving the car on [xxx] at 9pm on sunday, [xxx] in lane two during a heavy rain a audible clicking noise came from the drivers side front of the dash instrument cluster area and all of the lights on the car simultaneously turned off without ever touching the light switch i was unable to see the road in front of the vehicle also the windshi…”
2025-01-06 · Unknown Or Other“check right tail and brake lamps warning light will not go off for months. they are working fine but the light won't go off. googling on mb world, it shows mercedes is aware of this problem and a recall is needed to get it corrected being safety issue with warning lights not working properly. see all info. below from owners, conversations and work …”
2024-12-21 · Service Brakes“went to the mercedes dealership service department to replace the rear subframe that suddenly broke while i was driving due to extreme rust/corrosion. the dealership stated that it was being covered under the extended warranty due to the recall related to the rust/corrosion issue with the subframe. i was advised by the mechanic that the brake line…”
2024-11-12 · Structure · 201,000 mi“the contact owns a 2009 mercedes-benz c300. the contact stated that while driving at various speeds, the rear end of the vehicle would fishtail and become extremely unstable while driving over a bump in the road or while turning. upon inspection, the contact discovered that the subframe was severely rusted. the cause of the failure was not determin…”
2024-09-18 · Steering“i drove my car to get lunch. came back out to go back to work and the car would not start. would not even turn over. my radio did not turn on and i couldn't even roll my windows back up. luckily they were only cracked open a small amount. my steering wheel cannot be turned, it's locked in it's current position. i am told the esl (electronic s…”
2024-09-04 · Exterior Lighting“headlight harness on drivers and passenger side is melting and my lights are flickering. i was advised to night drive my vehicle at night, because it could start an electrical fire. this is caused by heat from the lights.…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.