RoadVitals

2014 Mercedes-Benz C350 Problems

Owner-reported complaints filed with NHTSA, grouped by component

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
13
Latest Jan 8, 2026
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
8
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
1

What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2014 Mercedes-Benz C350, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Reports by component

Ranked by how many owner reports name each component category

  • Airbags853.3%
  • Body & structure16.7%
  • Brakes16.7%
  • Driver assistance16.7%
  • Electrical16.7%
  • Interior & seats16.7%
  • Powertrain (other)16.7%
  • Steering16.7%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Each component in detail

What the reports in each category say, in the owners' own words

Airbags

Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.

8
reports

From owner reports, verbatim

The contact owns a 2014 Mercedes-Benz C350. The contact stated that while attempting to start the vehicle, the air bag and the driver’s side air bag malfunction service required warning light illuminated. A dealer was contacted. The vehicle was taken to a dealer where it was determined that the air bags needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and declined to cover the cost of the repair. The approximate failure mileage was 64,000.

NHTSA ID 11683642 · filed Aug 28, 2025

I WAS NOTIFIED IN FEBRUARY 2019 THAT CAR NEEDED THE AIR BAGS REPLACED! HERE A YEAR AND A HALF LATER THEY STILL DON'T HAVE THE PARTS! I THINK THEY ARE LIEING TO ME!

NHTSA ID 11338875 · filed Jul 12, 2020
All 8 reports naming airbags

Body & structure

Reports naming the vehicle structure, frame, body panels, doors, hood and trim.

1
report

From owner reports, verbatim

1. the component that failed was the front stationary sunroof panel, and what failed on it was the adhesive which leads to it leaking water, and the potential of even falling off while driving 2. it could lead to falling off on the highway which could lead to damages to it or other vehicles around it 3. Unknown 4. Yes it was inspected at a nearby dealer ship in which they stated that the glue was failing on that part of the car and would need to be replaced 5. No warnings for this issue, i was only able to notice it because when it rains now if not under cover that part of the car will allow water to leak into the vehicles inside There was a recall campain in which the number is 2021070010 and it included 2014-2020 mercedes C class which my vehicle matches said description but when i have tried to get this issue resolved but my vehicles vin number was not apart of this recall as it shows across multiple sources

NHTSA ID 11591531 · filed May 30, 2024

Too few reports in this category for a page of its own — they appear in the full complaint list.

Brakes

Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.

1
report

From owner reports, verbatim

2014 Mercedes-Benz E-350 4matic. Brake fluid and Brake warning lights illuminated. The vehicle was taken to the local dealer where the service technician advised the brake lines to the rear tries were rusted and had to be replaced . The vehicle was repaired at a estimated cost of $2,900. The approximate failure mileage was 100,000. we were advised that the car is a hazard to drive until repaired. We have requested the dealer to turnover the failed parts for our inspection and use

NHTSA ID 11514058 · filed Mar 27, 2023

Too few reports in this category for a page of its own — they appear in the full complaint list.

Driver assistance

Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.

1
report

From owner reports, verbatim

2014 MERCEDES BENZ C350. CONSUMER WRITES IN REGARDS TO DEFECTIVE ACCELERATION SYSTEM. *LD THE CONSUMER STATED THE CRUISE CONTROL MALFUNCTIONED CAUSING A 4 CAR COLLISION. THE CONSUMER STATED THE INFORMATION IN THE POLICE REPORT WAS FALSE AND THAT THE CRASH WAS INADEQUATELY INVESTIGATED. *JS

NHTSA ID 11196319 · filed Apr 23, 2019

Too few reports in this category for a page of its own — they appear in the full complaint list.

Electrical

Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.

1
report

From owner reports, verbatim

STEERING WHEEL SPRING GROUNDING PROBLEM CAN ACCIDENTALLY DEPLOY AIRBAG. RECALLED IN OCT 2017 BUT I'M TOLD PARTS WILL NOT BE AVAILABLE UNTIL MAY 2018. THIS IS AN UNREASONABLY LONG TIME. I WENT TO TRADE-IN THIS CAR TO PURCHASE A NEW ONE AND WAS TOLD THAT NO DEALER CAN SELL A CAR WITH A PENDING SAFETY RECALL EXCEPT "AS IS" THROUGH AN AUTO AUCTION, WHICH LOWERS THE VALUE OF MY CAR BY OVER $2,000 VERSUS A NORMAL DEALER TRADE. HOW DO I RECOVER THIS LOSS WITHOUT SUING MERCEDES? ARE THERE ANY GOVERNMENT REMEDIES OTHER THAN PRIVATE LAWSUIT?

NHTSA ID 11056561 · filed Dec 26, 2017

Too few reports in this category for a page of its own — they appear in the full complaint list.

Interior & seats

Reports naming seats, latches, locks, linkages and interior fittings.

1
report

From owner reports, verbatim

The contact owns a 2014 Mercedes-Benz C350. The contact stated that while the vehicle was parked, the front driver’s side interior door latch detached. The contact had to reach through the front driver’s side window to open the front driver's side door using the exterior door handle. No warning lights were illuminated. The vehicle remained at the residence. A dealer was contacted and informed the contact that there was an unknown recall related to the failure; however, the VIN was not included in the recall. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 60,000.

NHTSA ID 11709762 · filed Jan 8, 2026

Too few reports in this category for a page of its own — they appear in the full complaint list.

Powertrain (other)

Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.

1
report

From owner reports, verbatim

I was driving my vehicle when the transmission started shifting erratically. The shifts were not smooth but hard and the car was shuddering. Yes the vehicle is available for inspection. My safety and the safety of others were at risk due to the erratic behavior of the vehicle and how it affected my ability to focus on driving safely. Yes my vehicle has been inspected by the manufacturer and the problem has been reproduced by my local Mercedes Benz dealer. There were no warning lamps or messages prior to the failure. After a few weeks of driving I saw a “low coolant” warning appear, this turned out to indicate that the radiator had leaked coolant into the transmission which damaged the internal transmission components and torque converter.

NHTSA ID 11546837 · filed Sep 27, 2023

Too few reports in this category for a page of its own — they appear in the full complaint list.

Steering

Reports naming the steering system — racks, columns, power-steering assist and steering linkage.

1
report

From owner reports, verbatim

STEERING WHEEL SPRING GROUNDING PROBLEM CAN ACCIDENTALLY DEPLOY AIRBAG. RECALLED IN OCT 2017 BUT I'M TOLD PARTS WILL NOT BE AVAILABLE UNTIL MAY 2018. THIS IS AN UNREASONABLY LONG TIME. I WENT TO TRADE-IN THIS CAR TO PURCHASE A NEW ONE AND WAS TOLD THAT NO DEALER CAN SELL A CAR WITH A PENDING SAFETY RECALL EXCEPT "AS IS" THROUGH AN AUTO AUCTION, WHICH LOWERS THE VALUE OF MY CAR BY OVER $2,000 VERSUS A NORMAL DEALER TRADE. HOW DO I RECOVER THIS LOSS WITHOUT SUING MERCEDES? ARE THERE ANY GOVERNMENT REMEDIES OTHER THAN PRIVATE LAWSUIT?

NHTSA ID 11056561 · filed Dec 26, 2017

Too few reports in this category for a page of its own — they appear in the full complaint list.

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .