Mercedes-Benz C-Class Complaints (2017)

253 consumer complaints on file.

#11674814July 20, 2025
UNKNOWN OR OTHER
My car caught on fire due to AC malfunction
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11666563June 12, 2025
SEAT BELTS
The contact owns a 2017 Mercedes-Benz C300. The contact stated that both the front driver’s side seat belt and front passenger's side seat belt had failed to retract as needed. There was no warning light illuminated. Additionally, the contact stated that the seat belts buckles would unintendedly lodge under the seats. The vehicle was taken to the local dealer, but was not diagnosed or repaired. The contact related the failure to NHTSA Campaign Number: 21V032000(Seat Belts); however, the VIN was not included. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11665836June 9, 2025
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
The sunroof is very glitchy and this is common in all Benz I have had a few different Benz and they all eventually have this same issue with their panoramic sunroof. Sometimes it opens half way life one side is up and the other side is closed and other times it will open fully but not close and other times it won’t open at all. This is a common problem that many Benz owners have stated this in the Benz forums all over. This is a safety issue due to unexpected weather conditions if it rains and it’s stuck inside gets damage and owners get wet which is also a distraction and may cause accidents. Please investigate this issue thoroughly. Their sunroofs should be recalled and extended warranties placed on them automatically by Mercedes Benz due to this being a very common issue in all model’s panorama sunroofs particularly C300s year 2017 thank you for looking into this matter.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11656486April 24, 2025
STEERING, SUSPENSION
unknown
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654348April 13, 2025
ELECTRICAL SYSTEM, ENGINE
ESP control unit software Recall 2016090002 Recall 2017110002 Recall 2020080016 And my car shows there’s cero recall active but is giving me problem showing code: U0121 u1110 U0122 B227d U0423 B227d
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11643047February 16, 2025
ENGINE
this is my send time writing in. mercedes used the wrong wrist pins for the pistons leading to my wife getting a cracked piston on freeway in phx.if you look up cylinder 1 issues on this model there is a lot of people who have encountered this. why this hasn't been recalled and sticking consumers with a10k plus repair is beyond me. if you use the wrong parts you should be responsible for the repair!!!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11635619January 13, 2025
UNKNOWN OR OTHER
Error code P052E71 on a 2017 c300 with 100k miles. It seems to be a very common and recurring issue that appears to have no real solution and is costing consumers thousands upon thousands. This malfunction does relate to emissions and this vehicle is operated in California.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11635775January 13, 2025
POWER TRAIN
PVC VALVE CODE. P052E Mercedes should fix this!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11625696November 16, 2024
VEHICLE SPEED CONTROL, UNKNOWN OR OTHER
The valve for crankcase ventilation has a malfunction. The actuator is blocked Select 'Error codes / Events' menu in Engine Control Unit. Then read fault memory.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11624452November 10, 2024
FUEL/PROPULSION SYSTEM, SEAT BELTS
small to much gas inside the cab and outside and bouth seatbelt doosent work corectly
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623039October 31, 2024
ENGINE
I have an error code: P052E.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11621666October 24, 2024
STRUCTURE:BODY, ELECTRICAL SYSTEM
When i scan my vehicle there are Mercedes Benz fault codes pertaining to the electrical system but also recalls that haven’t been done but when looking Mercedes Benz web site and NHTSA WEBSITE these are aren’t showing up as my particular chassis being included as part of the campaign
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11621009October 21, 2024
ENGINE, FUEL/PROPULSION SYSTEM
my whole entire car smells like gas. I cannot drive this car around because I will pass out and it is a safety hazard. There is a recall for this exact same issue, just not for my Vin number. I would like to get this done for my car, please.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11615637September 20, 2024
VISIBILITY:SUN/MOON ROOF ASSEMBLY
The contact owns a 2017 Mercedes-Benz C300. The contact stated while driving 65 MPH, there was a loud banging sound coming from the roof of the vehicle, prior to the glass sunroof panel being ejected from the roof panel and landed on the roadway. The cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure. The failure mileage was 84,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11613280September 8, 2024
UNKNOWN OR OTHER
I purchased my 2017 Mercedes c class coupe in 2020, used. Around 2021, I started hear noise from the sunroof when driving on the highway. I went to get it repaired and they mentioned they needed to tighten the screws. This week, I was closing my sunroof and then I heard a crack. I went to a shop to get it manually closed for now on calis 105 degree heat. I am now learning there has been recalls for Mercedes 2017+ coupes but it’s not stated for my specific car to get it fixed. How do I go about this? I feel the sunroof is faulty and has been faulty.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612144September 2, 2024
UNKNOWN OR OTHER
The glass on the panoramic sunroof exploded/shattered under normal driving conditions. It was raining but not too heavy. It didn’t appear that anything hit the glass and no potholes were hit. It seemed to be due to pressure or temperature which caused the explosion which sounded like a loud gunshot and the glass was in pieces. There were no injuries as the sunroof shade was closed and thus the glass fell on the shade. It has not been inspected by dealership or insurance as closed on Sunday and today due to Labor Day, but yes it is available for inspection upon request. However, as it was raining and I needed to get home, I covered the entire sunroof with Duct Tape.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11610018August 21, 2024
UNKNOWN OR OTHER
The same part that was recalled the Starter Current Limiter has overheated again. The dealership is trying to charge for this same part for diagnostic, parts and labor. The car produces smoke around the battery and melted due to overheating. The battery is new. The car only turns over..then immediately overheats. Just because it was recalled and replaced does NOT mean it is perfect from defaulting again. Please have someone look into this matter.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11609586August 20, 2024
ENGINE, FUEL/PROPULSION SYSTEM
Keep getting a code P052E! Changed the oil and code went away for a few days then came back. Looked into getting it fixed and it seems like Mercedes has known about this issue and hasn’t called for a recall on this piece of equipment! Very costly to fix and says it needs to be replaced every 30k to 50k miles! At around 1k to 3k to fix everytime that’s something they should recall
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11607831August 11, 2024
ENGINE
P052E code for PCV vent valve
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11607748August 10, 2024
ENGINE
cracked piston in cylinder #1. After doing research this is a common problem in the m274 engine from 2015-2018 which Mercedes is aware of but does nothing. mercedes need to be held responsible and a recall issued. This isn't a 2 or 3 thousand dollar repair!! this repair is 6 figures!!! Please hold them acountable!!! THX
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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