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2017 Mercedes-Benz C300 Problems and Recalls
Owners filed 216 complaints with NHTSA about the 2017 Mercedes-Benz C300, most often about the engine (37% of complaints, typically around 42,000 miles). It is 7th of 17 C300 model years by number of complaints and has 15 recalls.
Most common 2017 Mercedes-Benz C300 problems
Engine
79 complaints · 37%Half of these problems showed up before 42,000 miles. Parts named most often: exhaust system.
Piston 1 cracked at 48,000 miles. Mb told owner that the engine had to be replaced but when finding out that the warranty was up at 50,000 they replaced the piston instead. Car is still shaking at idle and rough ride. Engine shakes and jerks.
2017 mercedes C300 coupe 49,000 miles. This car has been to the service center 10 times for engine problems " vibratiing, jerking, shaking and ticking" last visit at hoehn mercedes,. Service tech said that these engines automatically vibrate and jerk and that is just the nature of the beast?? Wtheck???!! Have already…
Other or unspecified
34 complaints · 16%Half of these problems showed up before 4,500 miles.
Windshield quality does not meet my expectation. My windshield cracked within a couple months by a piece of rock on the road while driving on freeway.
My windshield cracked the 2nd day I had the vehicle. " sept 2017". I have informed the mb mechanic several times and he did nothing after many failed attempts with mercedes of el cajon I asked to be placed with a new service advisor. Recieved my new windshield in feb 2018 already having problems. Little cracks are…
Fuel system
33 complaints · 15%Half of these problems showed up before 55,000 miles.
The contact owns a 2017 Mercedes-Benz C300. When the contact started the vehicle with the mobile app, she noticed a fuel odor emitting from the vehicle. When the vehicle was started manually, the odor was not present. The contact took the vehicle to park place motorcars dallas (located at 6113 lemmon ave, dallas, tx…
The contact owns a 2017 mercedes benz C300. The contact stated that while the heater was activated, there was an abnormal fuel odor coming from the vents into the vehicle. The vehicle was not taken to a dealer or mechanic to be diagnosed. The contact stated that the fuel odor only occurred during the winter. The…
Electrical
31 complaints · 14%Half of these problems showed up before 45,000 miles. Parts named most often: software.
So I just got my mercedes benz C300 4matic I only have 44,711 miles on it and I barely drive it, so today I was driving and the whole day things were great and I stopped at a store got back in and it says 'power steering malfunction' I was on a street in the city, I'm on confused on how this is happening to a car I…
Piston 1 cracked at 48,000 miles. Mb told owner that the engine had to be replaced but when finding out that the warranty was up at 50,000 they replaced the piston instead. Car is still shaking at idle and rough ride. Engine shakes and jerks.
Body and structure
24 complaints · 11%Half of these problems showed up before 40,000 miles. Parts named most often: body.
The contact owns 2017 Mercedes-Benz C300. The contact stated while driving 45 MPH, he heard air coming in through the osi cover. Once the contact arrived at his destination, he noticed that the front sunroof panel had detached from the vehicle. The dealer was contacted and stated that the vehicle was not under…
The contact owns a 2017 Mercedes-Benz C300. The contact received notification of NHTSA campaign number: 21v197000 (structure) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made…
Seat belts
21 complaints · 10%Half of these problems showed up before 20,000 miles. Parts named most often: front, critical fasteners, pretensioner.
The contact owns a 2017 Mercedes-Benz C300. The contact stated while starting the vehicle, the front seat belt pretensioner failed. Upon investigation, the contact associated the failure with NHTSA campaign number: 17v251000 (seat belts) however, the VIN was not included. The vehicle was not taken to the local dealer.…
The contact owns a 2017 Mercedes-Benz C300. The contact stated that the driverâs and passengerâs side front seat belts failed to retract completely upon release. Due to the failure, the seat belts would fall to the floor upon release from the buckle. The contact then received notification of NHTSA campaign number…
Air bags
15 complaints · 7%Half of these problems showed up before 14,000 miles. Parts named most often: frontal.
The contact owned a 2017 Mercedes-Benz C300. While at a stop light, the contact's vehicle was involved in an head on collision. The driver's air bag deployed, but not to full capacity. The contact sustained head and neck injuries that required medical attention. A police report was filed. The vehicle was towed to a…
I hit a bear in montana in my 2017 mercedes C300 at 86mph and destroyed the front of my car. The seatbelts deployed and wrenched US into our seats and smoke came out of the front air vents but the airbags did not go off. On the dash the vehicles stated that the airbags in all 4 zones in the car malfunctioned and…
Steering
13 complaints · 6%Half of these problems showed up before 25,000 miles.
The contact owns a 2017 Mercedes-Benz C300. The contact stated that while starting and driving the vehicle, the electric power steering was inoperable. There were no warning lights illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no…
Problem "power steering malfunction" . Frist time of this happened was from may 17, 2018,the steering wheel cannot move when the vehicle was start up. Second time is today,oct 16,2018. When I start up the cat, "power steering malfunction" come up on screen. Think if steering cannot turning while driving on highway…
Complaints are owner reports to NHTSA, not verified defects. One complaint can name several components, so shares add up to more than 100%.
2017 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.
Infotainment and connectivity: auto crash notification
Risk: A disabled ecall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.
Fix: The communication module software will be updated through an over-the-air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed july 8, 2022. Owner notification letters will be mailed in phases, on july 8, 2022, may 17, 2024, july 29, 2024, and september 27, 2024. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's numbers are for this recall is 2022060005 and 2023110006.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2017-2022 cla-class, gla-class, gle-class, gls-class, slc-class, a-class, amg gt-class, c-class, e-class, s-class, sl-class, glc-class, cls-class, glb-class, and g-class vehicles. Please refer to mbusa's recall report for specific vehicle model details. An error in the communication module's sim card software can cause a mobile network connection failure, disabling the emergency call (ecall) system.
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: auto crash notification
Risk: A disabled ecall system would prevent a vehicle occupant from contacting emergency services through the call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.
Fix: Mbusa will notify owners, and dealers will inspect the communication module and activate it, if necessary, free of charge. The recall began march 31, 2021. Letters for the owners of the 9 additional vehicles were mailed july 9, 2021. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2021030005.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2017-2019 c300, e300, 2018-2020 cla250, 2020 cls450, amg e53, amg gt53, gle450, 2018 amg e63, amg gta, 2017-2020 gla250, glc300, 2019 glc350, amg glc43, 2017-2018 gle350, 2019 amg glc 43, glc350, gle400, 2017 gls450, s550, c300 cabrio, and 2018-2019 s560 vehicles. On june 18, 2021, an additional 9 vehicles were added, including certain 2021 gla250, glc300, 2018 s450, e400, and 2017 cla250 vehicles. The communication module might have been inadvertently deactivated during a service visit, which could have disabled the emergency call (ecall) function.
Infotainment and connectivity: auto crash notification
Risk: Failure of the ecall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.
Fix: Mbusa will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began march 12, 2021. Owners may contact mbusa customer service at 1-877-762-8267. Mbusa's number for this recall is 2021020025.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2016 - 2021 cla-class, gla-class, gle-class, gls-class, slc-class, a-class, gt-class, c-class, e-class, s-class, cls-class, sl-class, b-class, glb-class, glc-class, and g-class vehicles. Please refer to the part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (ecall) in the event of a crash.
Seat belts: retractor
Risk: If the seat belt does not fully retract, the occupant may find the operation of the seat belt inconvenient and not wear it, increasing the risk of injury in the event of a crash.
Fix: Mbusa will notify owners, and dealers will check the retraction function of the front seat belts and adjust the damping foam within the b-pillars, as necessary, free of charge. The recall began february 26, 2021. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2021020010.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2017-2021 c300, 2017-2020 amg c43, and amg c63 vehicles. The front seat belts might not fully retract to their stowed position. As such, these vehicles fail to comply with the requirements of federal motor vehicle safety standard (fmvss) number 208, "occupant crash protection."
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
Seats
Risk: If the seatback does not properly lock, in the event of a crash, the seatbacks may fold forward, increasing the risk of injury.
Fix: Mercedes will notify owners, and dealers will inspect the locking of the seatback on the affected vehicles and replace the seatback lock, as necessary, free of charge. An interim owner letter was mailed on april 12, 2019 to notify owners. Owners will receive a second notification when the remedy is available. Owners may contact mercedes-benz customer service at 1-800-367-6372. Mbusa's number for this recall is 2019040007.
Full defect summary
Mercedes-benz USA, llc (mercedes) is recalling certain 2017-2018 mercedes-benz c300 cabriolet, c300 coupe, amg c43 coupe, c300 4matic cabriolet, c300 4matic coupe, amg c43 cabriolet, amg c63 cabriolet, amg c63 coupe, amg c63 s cabriolet and amg c63 s coupe vehicles and 2018 mercedes-benz e400 coupe, e400 cabriolet, e400 4matic cabriolet and e400 4matic coupe vehicles. The seatbacks of the front seats may not properly lock on the right side of the seat.
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.
Body and structure: body
Risk: If the beltline trim were to separate from the vehicle while driving, it could become a road hazard, increasing the risk of a crash.
Fix: Mbusa will notify owners, and dealers will inspect the rear beltline trim and replace the trim if necessary, free of charge. The recall began on september 21, 2018. Owners may contact mbusa customer service at 1-800-367-6372.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2017-2018 mercedes c300 cabriolet, c300 4matic cabriolet, c43 amg cabriolet, c63s amg cabriolet, and c63 amg cabriolet vehicles. Due to a bonding issue introduced in the production process, the rear beltline trim may separate from the vehicle.
Seats
Risk: If the seatback does not properly lock, in the event of a crash, the seatbacks may fold forward, increasing the risk of injury.
Fix: Mbusa will notify owners, and dealers will inspect the locking of the seatbacks, replacing the seatbacks lock, as necessary, free of charge. The recall is expected to begin may 25, 2018. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2018040007.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2017-2018 c43 amg 4matic coupe, c300 coupe, c300 4matic coupe, c300 4matic cabriolet, c300 cabriolet, c43 amg 4matic cabriolet and c63s amg cabriolet, 2017 c63 amg cabriolet, c63s amg coupe and c63 amg coupe, 2018 e400 coupe and e400 4matic coupe vehicles. The seatbacks of the front seats may not properly lock on the right side of the seat.
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
Steering: electric power assist system
Risk: A loss of electrical contact will cause the electric power steering assist to deactivate, increasing the risk of a crash.
Fix: Mbusa will notify owners, and dealers will replace the electric power steering rack, free of charge. The recall began june 2017. Owners may contact mbusa customer service at 1-800-367-6372.
Full defect summary
Mercedes-benz USA, llc. (mbusa) is recalling certain 2016-2017 c300 vehicles. The electrical contacts for the power steering electric motor may not have been properly welded, possibly resulting in a loss of electrical contact.
Seat belts: pretensioner
Risk: If the front seat seatbelt pretensioners do not function properly, the seat occupants may not be adequately restrained in the event of a crash, increasing the risk of injury.
Fix: Mbusa will notify owners, and dealers will replace the front seat belts, free of charge. The recall began october 13, 2017. Owners may contact mbusa customer service at 1-800-367-6372.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2017 c300, c300 4matic, c300 coupe, c300 coupe 4matic, c43 amg, c43 amg coupe, c43 amg cabrio, c63 amg, c63 amg coupe, c63s amg, c63s amg coupe, c63s cabrio, glc300, glc300 4matic, glc43 amg, s550, s550 4matic, s550e, s600, s63 amg 4matic, s65, mercedes-maybach s550 4matic, and mercedes-maybach s600 vehicles. The affected vehicles have front seat seatbelt pretensioners that may not function properly in the event of a crash. As such, these vehicles fail to comply with the requirements of federal motor vehicle safety standard (fmvss) number 208, "occupant crash protection," and 209, "seat belt assemblies."
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.
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
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 2017 Mercedes-Benz C300
- What are the most common problems with the 2017 Mercedes-Benz C300?
- By NHTSA owner complaints: engine (79 complaints, typically around 42,000 miles); other or unspecified (34 complaints, typically around 4,500 miles); fuel system (33 complaints, typically around 55,000 miles).
- How many recalls does the 2017 Mercedes-Benz C300 have?
- 15 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 2017 a bad year for the Mercedes-Benz C300?
- It is 7th of 17 C300 model years by number of complaints, with 216 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.