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2015 Mercedes-Benz C300 Problems and Recalls
Owners filed 381 complaints with NHTSA about the 2015 Mercedes-Benz C300, most often about the engine (34% of complaints, typically around 52,000 miles). It is the 3rd most complained-about C300 model year since 2000 and has 11 recalls.
Most common 2015 Mercedes-Benz C300 problems
Engine
128 complaints · 34%Half of these problems showed up before 52,000 miles. Parts named most often: cooling system, exhaust system.
Bought used mercedes C300 2015 4matic on feb'2019, odometer reading was 44k miles with clean carfax report. After driving just about 7k mikes more, at 53k mikes car shows engine warning. This is unfortunate from mercedez that with this much of nirmal use, car is having engine issues.
The contact owned a 2015 Mercedes-Benz C300. The contact stated that while idle, the engine would vibrate with an abnormal sputtering sound coming from the engine. As the failure persisted, the check engine warning light illuminated. The contact had initially taken the vehicle to a dealer and the spark plugs were…
Fuel system
70 complaints · 18%Half of these problems showed up before 47,500 miles.
There is a fuel hose (parts number: [phone]) connect to the high pressure pump in front engine area. The fuel hose was fastened by a clamp (not sure the parts number) . Because of the design flaw, this clamp will loose since it's a snap joint assemblies not tighten by screws. Under this situation, the fuel hose will…
Gasoline fuel hose leak between the engine and the driver side causing a strong gasoline smell inside the cabin and under the hood when the car is running and causing a fire hazard
Other or unspecified
63 complaints · 17%Half of these problems showed up before 30,000 miles.
Speakers randomly stop working - sometimes for a few hours and other times for up to 5 days. When speakers are not working, this means the stereo, navigation, bluetooth calls, and emergency calls are inaccessible. This is a problem for many drivers please click on the link below.…
I was driving 580-e and merging onto I-5 s when I hit a humongous pot hole with my left font tire causing it to immediately blow out. That in-turn caused my stability tracking to engage, which caused me to slow down drastically. That caused another vehicle to near miss ramming me in the back and me side swiping…
Body and structure
60 complaints · 16%Half of these problems showed up before 62,500 miles. Parts named most often: body, frame and members.
The contact owns a 2015 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, there was an abnormal sound coming from the vehicle. The vehicle was driven to the shoulder of the road. The contact inspected the exterior of the vehicle and became aware that the moon roof panel had detached…
The contact owns a 2015 Mercedes-Benz C300. The contact stated that the sun roof ceased in the open position. The contact stated that the adhesive on the paneling had deteriorated which caused the sun roof to lose functionality. The vehicle was not taken to the local dealer. Upon investigation, the contact associated…
Electrical
50 complaints · 13%Half of these problems showed up before 20,000 miles. Parts named most often: wiring.
The contact owns a 2015 Mercedes-Benz C300. The contact received notification of NHTSA campaign number: 17v114000 (electrical system, engine and engine cooling). The part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. A dealer was…
2015 mercedes benz C300 (w205) hacked satellites issue on mon mar 19, 2018 affecting command/audio 20 system initial issue: *bluetooth audio would not connect subsequent issues: *radio selection freezes all operations for about 60-seconds, and does not provide access to radio *bluetooth disabled permanently in system…
Steering
23 complaints · 6%Half of these problems showed up before 40,000 miles.
The contact owns a 2015 Mercedes-Benz C300. The contact stated that after starting the vehicle, there was an abnormal grinding sound coming from the vehicle. The contact stated that the steering wheel had seized. The contact had the vehicle towed to a certified mechanic and was informed of NHTSA campaign number…
The contact owns a 2015 Mercedes-Benz C300. While driving 30 MPH, the power steering failed and became very difficult to maneuver without warning. The vehicle was towed to the dealer where it was diagnosed that the computer chip needed to be changed. The vehicle was repaired. The manufacturer was made aware of the…
Suspension
22 complaints · 6%Half of these problems showed up before 50,000 miles. Parts named most often: subframe/mounting bracket.
The front drivers side suspension squeaks when wheel is turned or going over bumps. This car is less than 5 years old and around 50k miles. I am hopeful this is not a dangerous flaw in the suspension system.
I started the engine and the power steering failure warning came on. True enough, it was a struggle to steer my car back home - I was just 3 minutes away from home. The car was towed the next morning to autohaus on edens in northbrook, il. I did a google search and found out that there has been a recall for this exact…
Transmission
20 complaints · 5%Half of these problems showed up before 20,000 miles.
Was driving on city street, and the collision prevention assist disabled warning sign came on and I lost power to the car. I'm told this is called "limp mode." I tried to pick up speed by pressing throttle to the floor, but got no reaction at all. Then some power came back, but not much. Each time I braked to stop for…
The 7 speed transmission shifts very hard from 1 gear to 2 gear to 3 gear. From 3 gear all the way to 7 gear is very smooth. Also the same way around when you downshift from 3 gear to 2 gear to 1 gear. The slowing down is very harsh and it looks like the transmission doesn't understand that the car is going to a full…
Complaints are owner reports to NHTSA, not verified defects. One complaint can name several components, so shares add up to more than 100%.
2015 Mercedes-Benz C300 recalls
Body and structure: roof and pillars
Risk: A detached roof panel can become a road hazard, increasing the risk of a crash.
Fix: Dealers will replace the front panel, free of charge. Owner notification letters were mailed on august 2, 2024. Owner notification letters will be mailed in phases, on, march 22,2024, and august 2, 2024. Owners may contact mbusa customer service at 1-800-367-6372. This recall is an expansion of NHTSA recall number 21v-197.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2014-2020 c-class, cla, gla, s-class, glc, and gle vehicles. Please refer to mbusa's recall report for specific vehicle details. The front roof panel located between the windshield and the panoramic sunroof may not have been bonded correctly to the vehicle during a prior repair, allowing the front panel to detach from the vehicle.
Body and structure: roof and pillars
Risk: The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detach from the vehicle and become a road hazard, increasing the risk of a crash.
Fix: Mercedes-benz dealer will remove the bonded panel and will install a new front panel by following the detailed repair instructions and using the approved primer, cleaner and adhesive, free of charge. Owner notification letters were mailed on september 3, 2021 and october 26, 2021. Owners may contact mbusa customer service at 1-800-367-6372.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2017-2020 c300 coupe, c43 coupe amg, c43 amg, 2015-2020 c300, gla250, 2016-2018 c350e, cla45 coupe amg, 2015 c400, s65 amg, 2015-2019 c63 amg, 2016 c450, 2015-2016 gla45 amg, s600, 2016-2020 glc300, 2017-2019 glc43 amg, gle43 coupe amg, 2014-2019 cla250 coupe, 2014-2015 cla45 amg, 2018 glc63 amg, 2014-2017 s550, 2018-2020 s450, 2016-2019 gle63 coupe amg, 2016 gle450 coupe, 2014-2020 s63 amg, 2018-2019 s560, and 2019 glc350e vehicles equipped with a panoramic sunroof. The front roof panel located between the windshield and the panoramic sunroof may not have been bonded correctly to the vehicle during a prior repair.
Infotainment and connectivity: communication
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.
Full defect summary
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
Steering: rack
Risk: A car that cannot be properly steered has an increased risk of a crash.
Fix: Mbusa will notify owners, and dealers will replace the steering rack, free of charge. The recall began august 23, 2019. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2019080012.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2015-2016 mercedes benz c300, 2017-2019 c300 cabrio, c300 coupe, c63 cabrio, 2015 c63s amg, 2018-2019 c300, c350e, c63 amg, c63s amg cabrio, 2018 c63 amg cabrio, c63 amg coupe, c63s amg, c63s amg coupe, e300, e400 cabrio, e400 coupe, 2019 cls450, e450 cabrio, and e450 coupe rear-wheel drive vehicles. A locknut in the steering rack may break under high load, possibly causing the steering to become stuck in one position.
Air bags: frontal
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.
Full defect summary
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 coupe, c43 amg, c63 amg coupe, c63s amg coupe, c300 cabriolet, c300 4matic cabriolet, c43 amg cabriolet, c63 amg cabriolet, c63s amg cabriolet, glc300 4matic coupe, glc43 amg, glc43 amg coupe, 2014 e350 coupe, e350 4matic coupe, e350 cabriolet, e400 hybrid, 2015-2017 e400 coupe, e400 4matic coupe, e400 cabriolet, 2014-2017 e550 coupe, e550 cabriolet, b250e, 2014-2016 e250 bluetec, e63 amg 4matic wago
Electrical: software
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.
Full defect summary
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 c300 4matic sedan vehicles, 2015-2016 c300 sedan vehicles, and 2017 sl63 amg vehicles. Various control units on these vehicles may have been updated with incorrect software, potentially affecting the correct deployment of the air bags in the event of a crash.
Electrical: starter assembly
Risk: If the starting current limiter overheats, the surrounding components can melt, increasing the risk of a fire.
Fix: Mbusa will notify owners, and dealers will install an additional fuse in the electrical line to the starter, free of charge. The recall began august 31, 2017. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2017080002.
Full defect summary
Mercedes-benz USA, llc. (mbusa) is recalling certain 2015-2017 c300 4matic, c300, cla250, cla250 4matic and cla45 amg vehicles, 2017 c300 4matic cabrio, c300 4matic coupe, c300 cabrio, c300 coupe, e300, e300 4matic, e400 4matic wagon, e43 amg 4matic, gla250, gla250 4matic and glc300 4matic coupe vehicles and 2016 c350e and glc300 vehicles and 2016-2017 c450 4matic amg sport and glc300 4matic vehicles. In the event that the engine or transmission cannot turn over, the starting current limiter may overheat from the repeated attempts of the starter motor attempting to start the vehicle.
Steering: electric power assist system
Risk: If the vehicle experiences a loss of power steering assist, extra steering effort will be required, especially at lower speeds, increasing the risk of a vehicle crash.
Fix: Mbusa will notify owners, and dealers will update the power steering software, free of charge. The recall began in january 15, 2016. Owners may contact mbusa customer service at 1-800-367-6372.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain model year 2015 c300 and c400 4matic sedans manufactured january 27, 2014, to december 1, 2014. Due to an error in the electric power steering control unit software, the affected vehicles may have a loss of electric power steering assist.
Fuel system: fuel pump
Risk: If the locking plate is not properly secured to the fuel delivery module it may become loose, and leak fuel, increasing the risk of a fire. If the electrical wires are pinched, the fuel pump may stop working, resulting in a stall, thereby increasing the risk of a crash.
Fix: Mbusa will notify owners, and dealers will inspect the vehicles for improperly secured locking plates and pinched wires, correcting the vehicles as necessary, free of charge. The recal began on april 24, 2015. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2015030004.
Full defect summary
Mercedes-benz USA, llc. (mbusa) is recalling certain model year 2015 c300 4matic and c400 4matic vehicles manufactured april 7, 2014, to july 25, 2014. In the affected vehicles, the fuel delivery module may be improperly secured to the fuel tank. Secondly, electrical wires that connect to the fuel delivery module might have been pinched between the flange of the fuel delivery module and the tank.
Lights: headlights
Risk: If the original horizontal adjustment is used to alter the low beam aim, the misaimed headlamp may not properly illuminated the road or cause increased glare to oncoming drivers, which increases the risk of a crash.
Fix: Mercedes-benz will notify owners, and dealers will replace the horizontal adjustment mechanisms on the headlamps with sealing caps on the affected vehicles. The recall began may 23, 2016. Owners may contact mercedes at 1-800-367-6372.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain model year 2015 c300 and c400 vehicles manufactured from june 18, 2014, through september 5, 2014, that fail to comply with the requirements of federal motor vehicle safety standard number 108, "lamps, reflective devices, and associated equipment." the affected vehicles were assembled with horizontal adjustment mechanisms that allow the owner to change the horizontal adjustment used during the manufacturing process, instead of the proper sealing caps.
Steering
Risk: If the sliding shaft becomes disengaged from the steering coupling socket, the driver may experience noises, steering backlash, and in a worst case, loss of steering control, which may increase the risk of a crash.
Fix: Mbusa has notified owners, and dealers will inspect the steering coupling interlock mechanism to verify that it is in the locked position, free of charge. The recall began on october 1, 2014. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2014090008.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain model year 2015 c300 4matic and c400 4matic vehicles manufactured march 28, 2014, to september 18, 2014. If the steering coupling interlock mechanism is not locked in place, the sliding shaft, which is part of the steering column, could become disengaged from the steering coupling socket due to vibrations, steering thrust, or load feedback from the road surface.
Recall repairs are free at any franchised dealer. Enter your VIN at nhtsa.gov/recalls to see which recalls are still open on your car.
NHTSA defect investigations
C300 wrist-pin allegation
Summary
In a letter dated april 29, 2022, mr. Sergio betancourt (the petitioner) submitted a petition attributing engine failure of his 2015 mercedes-benz c300 to âwrong sized wrist-pinsâ and asserted that these were prevalent on all mercedes-benz models (including the metris minivan, glc300, and c300) equipped with a version of the m274 engine. The petition cited mercedes technical service bulletin (tsb) li03.10-p-060916 (meant for the 2015 c300) and postulated that the âwrong-sized wrist pinâ would allow the piston to âwiggle in the cylinder as it would move up and downâ. In addition to the mercedes-benz tsb, the petitioner enclosed a service center repair estimate and images of other
Desiccated air bag inflator rupture
Summary
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. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 blomquist report at www.NHTSA.gov/sites/NHTSA.gov/files/documents/expert_report-hrblomquist.pdf.consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substa
Front roof panel detachment
Summary
On january 8, 2021, after ongoing review with mercedes benz, the national highway traffic safety administration (NHTSA) office of defects investigation (odi) opened pe21-001 to assess allegations of front roof panel detachments while driving at highway speeds in certain 2015 mercedes-benz (mercedes) c-class vehicles.the subject front roof panel is a stationary panel composed of polycarbonate and is attached to the vehicle via adhesive at the time of manufacture. The panel is found on subject vehicles equipped with panoramic sunroofs. Over time, the subject panels may exhibit cosmetic degradation leading to replacement of the panel, a procedure which entails: removal of the old panel and adhe
Questions about the 2015 Mercedes-Benz C300
- What are the most common problems with the 2015 Mercedes-Benz C300?
- By NHTSA owner complaints: engine (128 complaints, typically around 52,000 miles); fuel system (70 complaints, typically around 47,500 miles); other or unspecified (63 complaints, typically around 30,000 miles).
- How many recalls does the 2015 Mercedes-Benz C300 have?
- 11 recalls listed by NHTSA, the latest from December 15, 2023 (body and structure). Check your VIN at nhtsa.gov/recalls to see which ones are still open on your car.
- Is the 2015 a bad year for the Mercedes-Benz C300?
- It is the 3rd most complained-about C300 model year since 2000, with 381 complaints. Complaint counts are not adjusted for how many cars were sold, so popular years collect more of them, and the newest years have had less time to.