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2020 Mercedes-Benz C300 Problems and Recalls
Owners filed 33 complaints with NHTSA about the 2020 Mercedes-Benz C300, most often about the engine (24% of complaints). It is 11th of 17 C300 model years by number of complaints and has 9 recalls.
Most common 2020 Mercedes-Benz C300 problems
Engine
8 complaints · 24%The contact owns a 2020 Mercedes-Benz C300. The contact stated that while at a stop, the vehicle failed to accelerate as intended. There was no warning light illuminated. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to…
Other or unspecified
5 complaints · 15%On a number of occasions, I have received an auditable warning, and a red light on the dash that disappears as quickly as it happens. I cannot contribute any cause for the warning and there isn't any residual information about the source of the warning.
Driver assistance
4 complaints · 12%Parts named most often: automatic emergency braking, warnings, warning, assist.
On a number of occasions, I have received an auditable warning, and a red light on the dash that disappears as quickly as it happens. I cannot contribute any cause for the warning and there isn't any residual information about the source of the warning.
Body and structure
4 complaints · 12%Parts named most often: body.
The contact owns a 2020 Mercedes-Benz C300. The contact stated that a section of the roof near the top of the windshield, between the sunroof, had detached and flown off the vehicle while driving 30 MPH in bumper-to-bumper traffic. The driver was able to grab the portion of the rubber gasket and pulled it into the…
Fuel system
3 complaints · 9%The fuel smell is coming from the rubber fuel, they are not cover by my cpo- warranty ( 3000 usd paid package). I found over 100 friends on facebook group has the same problems. Dealler refuse to cover. My kid is fell bad about the smell leaking.
Electrical
3 complaints · 9%The contact owns a 2020 Mercedes-Benz C300. The contact stated that her son was driving at an undisclosed speed when another vehicle's muffler detached and crashed into the undercarriage of the contact's vehicle. The front driver and passenger side tires exploded and fractured the rims. The contact stated that the…
Visibility and wipers
3 complaints · 9%Parts named most often: sun/moon roof assembly.
The contact owns a 2020 Mercedes-Benz C300. The contact stated while driving 55 MPH, the sunroof exploded without impact and glass fragments fell inside on the rear seats of the vehicle. The vehicle was taken to the dealer and the contact was informed that the sunroof needed to be replaced. The vehicle was not…
The contact owns a 2020 Mercedes-Benz C300. The contact stated that a section of the roof near the top of the windshield, between the sunroof, had detached and flown off the vehicle while driving 30 MPH in bumper-to-bumper traffic. The driver was able to grab the portion of the rubber gasket and pulled it into the…
Transmission
3 complaints · 9%
Complaints are owner reports to NHTSA, not verified defects. One complaint can name several components, so shares add up to more than 100%.
2020 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.
Backup camera: display function
Risk: An inoperable rearview camera display reduces the driver's rear view, increasing the risk of a crash.
Fix: Dealers will update the rearview camera software, free of charge. Owner notification letters were mailed july 15, 2022. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2022060007.
Full defect summary
Mercedes-benz USA, llc (mbusa) is recalling certain 2018-2021 cla-class, gle/gls-class, a-class, c-class, e-class, e-class coupe/convertible, gla/glb-class, glc-class, and cls-class vehicles. Please refer to mbusa's recall report for specific vehicle model details. The rearview camera may not display the rearview image due to a software error. As such, these vehicles fail to comply with the requirements of federal motor vehicle safety standard number 111, "rear visibility."
Lights: headlights
Risk: Incorrectly adjusted headlights may reduce visibility, increasing the risk of a crash.
Fix: Dealers will replace the LED headlights, free of charge. Interim letters notifying owners of the safety risk were mailed august 13, 2021. A second notice will be sent once the remedy is available. Owner notification letters were mailed january 2022. Owners may contact mbusa customer service at 1-800-367-6372.
Full defect summary
Mercedes-benz llc (mbusa) is recalling certain 2018-2020 c300, 2019-2020 a220, amg c43, amg c63, 2020 gle580, glb250, 2020-2021 gle450, gle350, 2021 amg gle63, and amg gle53 vehicles. The LED headlights may have been incorrectly adjusted during a vehicle repair. As such, these vehicles fail to comply with the requirements of federal motor vehicle safety standard number 108, "lamps, reflective devices, and associated equipment."
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: 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."
Engine: turbo/supercharger
Risk: An oil leak in the presence of an ignition source such as hot engine or exhaust components can increase the risk of a fire.
Fix: Mbusa will notify owners, and dealers will inspect the turbocharger oil lines and tighten them as necessary, free of charge. The recall began august 17, 2020. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2020070017.
Full defect summary
Mercedes-benz USA, llc. (mbusa) is recalling certain 2020 c300, e350, and glc300 vehicles equipped with turbocharged 4-cylinder gasoline engines. The screws that retain the turbocharger oil feed and return lines may not have been properly tightened, possibly resulting in an oil leak.
Infotainment and connectivity: communication
Risk: An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
Fix: Mbusa will notify owners, and dealers will replace the communication module, free of charge. The recall began april 14, 2020. Owners may contact mbusa customer service at 1-800-367-6372. Mbusa's number for this recall is 2020030016.
Full defect summary
Mercedes-benz USA, llc. (mbusa) is recalling certain 2020 c300 cabrio, c300 cabrio 4matic, c300 coupe, c43 amg cabrio 4matic, c43 amg coupe 4matic, c63s amg cabrio, cls53 amg 4matic, e350, e350 4matic, e450 cabrio, e450 cabrio 4matic, e450 coupe, e450 coupe 4matic, e450 4matic, e53 amg cabrio 4matic, glc300 coupe 4matic, glc300, glc300 4matic, glc63 amg coupe 4matic, amg gt63 4-door 4matic, and amg gt63s 4-door 4matic vehicles. An electrical circuit inside the emergency call system (ecall) communication module may be damaged, potentially relaying an inaccurate vehicle location.
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
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 2020 Mercedes-Benz C300
- What are the most common problems with the 2020 Mercedes-Benz C300?
- By NHTSA owner complaints: engine (8 complaints); other or unspecified (5 complaints); driver assistance (4 complaints).
- How many recalls does the 2020 Mercedes-Benz C300 have?
- 9 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 2020 a bad year for the Mercedes-Benz C300?
- It is 11th of 17 C300 model years by number of complaints, with 33 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.