Mercedes-Benz C-Class Complaints

3,817 consumer complaints on file.

#11488119October 5, 2022
SUSPENSION
rotted subframe rear
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11487590October 3, 2022
SUSPENSION, STRUCTURE
The contact owns a 2012 Mercedes-Benz C300. The contact stated that while having an oil change performed on the vehicle by an independent mechanic, he was informed that the cross member was severely corroded. The contact was informed by the mechanic that the vehicle was unsafe to drive. Neither the dealer nor the manufacturer had been notified of the failure. The vehicle was not repaired. The failure mileage was approximately 125,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11487599October 3, 2022
VISIBILITY:SUN/MOON ROOF ASSEMBLY
The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 55 MPH, an abnormal wind sound was coming from the sunroof. The contact then heard a loud banging sound and saw the dethatched sunroof panel in the rear-view mirror. The contact pulled over to assess the damage and then drove the vehicle home. The contact initially called the dealer where he purchased the vehicle and was referred to the local dealer authorized dealer for assistance. The contact was initially given an appointment that exceeded a reasonable amount of time for the repair. Upon investigation, the contact discovered NHTSA Campaign Number: 21V197000 (Structure) which he linked to the failure. The manufacturer was notified about recall and stated that they were unaware of that recall. The vehicle was not repaired. The failure mileage was approximately 96,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11487621October 3, 2022
UNKNOWN OR OTHER
I bought my 2016 merecedes benz c300 4 matic with the engine light on .when I did a diagnostic on it came back to a po52e is bad . It had 73000 on it when I bought . Now I sit at 77000 miles with the bad part .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11487454October 1, 2022
UNKNOWN OR OTHER, BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING
Rear sub frame is corroded as shown to me by the Mercedes mechanic in a video he sent me.The car is available for inspection. I am nervous to drive now after hearing about the related problems others are having such as braking issues and swaying when the brakes are applied. The way I found out about the rear sub frame corrosion was when I needed work done at the dealer. This problem should not be happening to all of these vehicles. In other countries, Germany and Canada, to name a couple, Mercedes dealers are fixing this through a recall. Why not the US? The date below is when the mechanic told me about the problem and that it would cost $8000. to $10,000 to repair
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11487460October 1, 2022
ENGINE
Vehicle throwing P052E error (crankcase ventilation valve - PCV) - Has occurred multiple times and has effected numerous C300 models of the years 2015-18. - The car has lower acceleration performance and can be potentially dangerous when merging on highways.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11487294September 30, 2022
UNKNOWN OR OTHER
I purchased my car one year ago from a Mercedes dealership - 8/31/2021. I brought it in for service at the same dealership a week ago and they told me the rear subframe rusted from the inside out and it FAILED inspection. The parts are $5,100 and not available until some time in Q1 2023. There is no way a car rusts from the INSIDE OUT in one year. I have another vehicle in the same driveway, same everything and there is no rust anywhere. We have had all of our cars at least 10 years. This was a "new" car for us. MBUSA said they could do nothing because I own the car and didn't get financing from them. My dealership so far is not helpful. My service guy (he has been for 10 years) says this is common?? My client (a different car manufacturer) says it is not and it is terrible. I don't know why it rusted but this is a defect in the car because we didn't flood it. It's dangerous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11487027September 29, 2022
STRUCTURE:BODY
A dealer inspection found a rusted away rear subframe with holes in it and near total failure and undriveable. The part is being removed by a dealer and its whereabouts after that will be unknown. Garage kept and continually cleaned a car such as this should not experience the visible decay it has after such a short time. A defect definitely existed in the sub-par metal products used during production. This issue presents a catastrophic situation if not realized in time. A factory recall is in order.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11486831September 28, 2022
SUSPENSION
Rear Subframe Rot. The vehicle was purchased July 2021 from Automax Of Frederick Maryland. I took the car to Euromotors of Bethesda and they informed me about the issue so I took it back to the dealership because the car was sold to me like this and the owner of the dealership let me know that his "guys" would have never passed it in the MD inspection if a hole was about to be there or severe rust. However it was still sold and now I have the problem of where one of my control arms are rusted out and the car is not safe to drive. The dealer also let me know that the rust was just "surface rust" and it was nothing to worry about. The dealer ask me to bring the car in to inspect and lifted and let me know they would put a ticket on it if the car gave me any problems they would take care of it. Never got anything from them.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11486722September 27, 2022
STRUCTURE:BODY, SUSPENSION
Had to replace the rear sub frame due to extensive rust and erosion. Major safety concern. This was brought to my attention at a routine maintenance service appointment. Almost as is they knew they should be looking for this problem. We are the only owners of this car. It is a garage parked car. No rust elsewhere just at the welded connection on the rear sub frame.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11486805September 27, 2022
SUSPENSION, STRUCTURE:BODY
Rear subframe cracked; car has less than 95,000 miles and looks great. My two children of driving age were using the vehicle at the time, driving others as well. Fortunately, I happened to drive it not longer after the issue and took it to the shop immediately. They put it on the lift and saw that the rear subframe was cracked all the way through. As it turns out, it is becoming very common on this make/model--and it is nearly impossible to get a replacement. Mercedes Benz told me maybe sometime in 2023. In addition to having it inspected, I have since been in contact with several dealers and mechanics. Results are invariable: the part is in extremely high demand, Mercedes cannot fill the demand, and the wait is indefinite but long. There were no warning lamps, messages or other symptoms of the problem. In addition to the inconvenience, the car was very dangerous to drive. I am thankful that my son did not seriously injure himself or others while driving. The crack renders the car unstable at anything but the slowest speeds. When one brakes at any speed over about 20-25 mph, the car pulls violently to one side. Simply braking alone could cause a major, even fatal, accident. And any emergency maneuver could be disastrous. The car has been garaged since June awaiting a replacement that I am told will cost between $4000 and $6000! I am left with a vehicle that runs very well--but is unsafe to drive on a public roadway--and no way to repair it. Moreover, Mercedes cannot tell me when the part may become available (likely sometime in 2023).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11486499September 26, 2022
VISIBILITY:FIXED PANARAMIC ROOF/SKY LIGHT ASSEMBLY
The contact owns a 2015 Mercedes-Benz C300. The contact stated that when she opened the panoramic roof, she heard a grinding noise and sunroof failed to close as designed. The contact then stated that the panoramic roof failed to open and close as needed. The vehicle was taken to the dealer where it was diagnosed that the panoramic roof guide rail had fractured and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was provided a case number. The failure mileage was approximately 48,000. The VIN was unavailable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11486195September 24, 2022
STEERING, SERVICE BRAKES, STRUCTURE:BODY
Rear subframe of vehicle rusted under regular use conditions and the left trailing arm mount broke off as a result. This caused vehicle braking to become extremely unstable and dangerous, even at low/medium speed. This is a known problem from this manufacturer and the Fed government should take action to force recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11485968September 23, 2022
UNKNOWN OR OTHER
Crank case ventilation system malfunction
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11486014September 23, 2022
UNKNOWN OR OTHER
the rear subframe rotted away
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11486036September 23, 2022
STEERING, UNKNOWN OR OTHER
Steering lock mechanism fails without warning and leaves vehicle and occupants stranded in potentially dangerous location. No onsite repair possible. Vehicle must be towed to authorized dealer for repair. > Safety of car occupants was at risk. > No warning prior to failure. > Repair cost ~!500. Unsure of reliability of replacement unit > My dealer says this is a frequent occurrence. 6+ repairs / month for this model car at this dealer, Expects same frequency at others > Dealer service agent stated he personally believes it should be covered by a recall or free repair. > Filed formal complaint with Company (Mercedes-Benz) but reimbursement was refused. > Similar stranding incident on same car occurred in 05/2021 and car require tow to same dealer who suspected same problem but was unable to duplicate and/or repair the failing component at that time
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11485892September 22, 2022
STRUCTURE:FRAME AND MEMBERS
The contact owns a 2012 Mercedes-Benz C300. The contact stated that the vehicle was taken to be serviced under an unknown recall however, the mechanic informed him that the rear subframe was severely rusted, creating holes in the subframe. The dealer diagnosed that the subframe needed to be replaced. The vehicle had not been repaired due to the part being on backorder. The manufacturer was made aware of the failure and informed the contact that there was no recall or warranty coverage for the failure. The approximate failure mileage was 65,500.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11485645September 21, 2022
SEATS
The driver seat has movement when brakes are applied while coming to a stop & when decelerating.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11485163September 19, 2022
ENGINE
Crank case to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11485232September 19, 2022
UNKNOWN OR OTHER, SUSPENSION
Brought my car to the dealership because I was hearing a noise when going over bumps. Also noticed some instability when braking and driving at highway speeds. Dealer informed my my subframe had rusted and told me the car was unsafe to drive.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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