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2021 Mercedes-Benz C300 recalls & problems

The 2021 Mercedes-Benz C300 has 7 safety recalls and 14 owner complaints on file with NHTSA. The most-reported problem area is engine (8 complaints).

Recalls7safety recalls
Complaints14filed by owners
Crashes · fires0 · 0reported in complaints
Injuries · deaths0 · 0reported in complaints

Safety recalls

Fuel system, gasolineJun 26, 2023

Delivery › Fuel pump

Recall 23V445000143,551 vehicles

Problem
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, which can result in a loss of drive power.
Risk
A loss of drive power can increase the risk of a crash.
Fix
Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2023070012.
CommunicationMay 20, 2022

Auto crash notification

Recall 22V365000242,722 vehicles

Problem
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.
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.

Components: Communication › Auto crash notification; Electrical system › Software

Back over preventionApr 8, 2022

Display function

Recall 22V232000126,443 vehicles

Problem
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."
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.
SeatsMay 28, 2021

Mid/rear assembly › Head restraint

Recall 21V406000218 vehicles

Problem
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 C300 Cabriolet, C43 AMG Cabriolet, C63 AMG Cabriolet, C63 AMG S Cabriolet, E450 Cabriolet, and E53 AMG Cabriolet vehicles. The rear headrests may be incorrectly mounted to the seatbacks.
Risk
Incorrectly mounted headrests could move or detach from the seat during a crash, increasing the risk of injury.
Fix
Dealers will inspect the rear seatback guide bushings and replace them if necessary, free of charge. Owner notification letters were mailed July 16, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021060010.
Seat beltsApr 1, 2021

Pretensioner

Recall 21V2300008,634 vehicles

Problem
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 C-Class, E-Class, E-Class Coupe and Convertible, GLC, CLS, AMG GT 4-door Coupe and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. A faulty electrical contact within the seat position switch may prevent the driver and passenger air bags and seat belt force limiters from properly activating during a crash.
Risk
Air bags and seat belts that do not perform properly in a crash can increase the risk of injury.
Fix
MBUSA will notify owners, and dealers will replace the seat position switches, free of charge. Owner letters were mailed May 21, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021040016.

Components: Seat belts › Pretensioner; Air bags › Sensor › Occupant classification; Seats

CommunicationFeb 5, 2021

Auto crash notification

Recall 21V0580001,292,258 vehicles

Problem
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.
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.

Components: Communication › Auto crash notification; Electrical system › Software

Seat beltsJan 29, 2021

Front › Retractor

Recall 21V03200024,550 vehicles

Problem
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."
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.

Recall repairs are free at any authorised dealer. A recall listed here may already have been fixed on a particular car: enter its 17-character VIN at nhtsa.gov/recalls to see open recalls.

Fuel economy

C300 Coupe

27mpg combined
City / highway24 / 33 mpg
FuelPremium Gasoline

2 L · 4 cyl · Automatic 9-spd · Rear-Wheel Drive · about $3,050/year to fuel

C300 4matic

27mpg combined
City / highway23 / 33 mpg
FuelPremium Gasoline

2 L · 4 cyl · Automatic 9-spd · 4-Wheel Drive · about $3,050/year to fuel

C300

27mpg combined
City / highway23 / 35 mpg
FuelPremium Gasoline

2 L · 4 cyl · Automatic 9-spd · Rear-Wheel Drive · about $3,050/year to fuel

C300 4matic Coupe

26mpg combined
City / highway23 / 32 mpg
FuelPremium Gasoline

2 L · 4 cyl · Automatic 9-spd · 4-Wheel Drive · about $3,150/year to fuel

C300 Convertible

26mpg combined
City / highway23 / 31 mpg
FuelPremium Gasoline

2 L · 4 cyl · Automatic 9-spd · Rear-Wheel Drive · about $3,150/year to fuel

C300 4matic Convertible

25mpg combined
City / highway22 / 30 mpg
FuelPremium Gasoline

2 L · 4 cyl · Automatic 9-spd · 4-Wheel Drive · about $3,300/year to fuel

EPA estimates from fueleconomy.gov for each engine and transmission sold. Annual cost is the EPA's estimate for 15,000 miles a year at its current fuel and electricity price assumptions. Your results will vary.

What owners report

Problem areaComplaintsCrashesFiresInjuriesTypical mileage*
Engine8000—
Fuel/propulsion system2000—
Air bags1000—
Electrical system1000—
Back over preventionSensing system › Camera1000—
Power train1000—
VisibilitySun/moon roof assembly1000—
Fuel system, gasoline1000—

*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.

Recent owner complaints

Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.