2018 Mercedes-Benz C300 Body and structure Problems
- Complaints
- 14about this part
- Share
- 14%of 99 total for the year
- Median mileage
- 47,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 14 complaints about the body and structure of the 2018 Mercedes-Benz C300, 14% of the 99 complaints for this model year. Where a mileage was given, the median is 47,000 miles. 2 of these say a crash was involved, according to the filers. 3 recall campaigns on record are filed under a similar system.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Date: april 13, 2021. Model: C300 year : 2018 milage: 16,000. Time: 2.30 p.m. Whether: sunny. Road condition: smooth problem: while driving on 405 south at speed of approx 65 to 70 MPH for no apparent reason , the car uddenly , unexpectedly, and forcefully slammed on the brakes ( 65 to 0 MPH) in matter of seconds, and locked its wheels. Left me stock on the fwy. The most scariest experience as you don't know what is going on or what is going to happen to . Luckily there were no vehicles in my close proximity or we could have died ! The warning signs were on inoperative break assist system . …”
NHTSA complaint #11413726, filed 2021-04, 35 miles“Problem a recall was done on certain Mercedes vehicles where the front panel of the roof between the panoramic sunroof and windshield has defects in gluing or bonding agent from the manufacture. I believe my vehicle is showing possible premature bonding agent issues below the surface of panel. Where the manufacture bonding glue is causing interior flaking and cracking and lifting from the stress of the wrong/incorrect specified bonding material not used during the manufacturing process . …”
NHTSA complaint #11614170, filed 2024-09“While I was driving to work in a heavy rain my abs malfunction light came on in my car. I decided to take it to the Mercedes-Benz dealership in Fresno. They said it was the ABS module that needed to be replaced. After being in the shop for almost 3 weeks they said it was fixed. When I went to pick it up, the moment I turned it on the ABS malfunction light came on again. I was told that it was okay to drive and they would have somebody come check it out at my work the next day. My car went back into the shop for another week and they could not figure out what was wrong with it. …”
NHTSA complaint #11589822, filed 2024-05“The contact owns a 2018 Mercedes-Benz C300. The contact stated that while driving approximately 60 MPH, a part of the panoramic roof towards the driver's side detached from the vehicle. The contact pulled over to inspect the vehicle. The part was no longer attached, and the contact had to continue driving. The failure caused additional electrical failures due to water entering the cabin of the vehicle. The contact stated that the sunroof failed to open, and the infotainment center was inoperable. …”
NHTSA complaint #11681537, filed 2025-08, 109,000 miles“The contact owns a 2018 Mercedes-Benz C-300. The contact stated that while driving 70 MPH South on the interstate towards Miami, the front panel detached without warning. The contact pulled over to inspect the vehicle and became aware that the panel between the windshield and sunroof had detached. The contact stated that water started entering the vehicle from several areas. The sunroof was inoperable. The contact called the insurance company. The contact associated the failure with NHTSA Campaign Number: 23V854000 (Structure). The local dealer was contacted. …”
NHTSA complaint #11759626, filed 2026-08, 83,000 milesRelated recalls
- 23V854000Dec 15, 2023Mercedes-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…Covers: Mercedes-Benz C300 2015–2020, CLA250 2014–2019, AMG C63 2015–2020 +19 more
- 21V197000Mar 19, 2021Mercedes-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…Covers: Mercedes-Benz C300 2015–2020, AMG S63 2014–2020, CLA250 2014–2019 +19 more
- 18V456000Jul 10, 2018Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2018 Mercedes C300 Cabriolet, C300 4Matic Cabriolet, C43 AMG Cabriolet, C63S AMG Cabriolet, and C63…Covers: Mercedes-Benz C300 2017–2018, AMG C43 2017–2018, AMG C63S 2017–2018 +1 more
Related service bulletins
- 11038217Sep 14, 2026Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise…
- 11036511Aug 24, 2026Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket…
- 11036101Aug 6, 2026Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise…
- 11033050May 22, 2026Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline…
- 11031659Apr 28, 2026Complaint Damaged cords/tensioning cables at the soft top interior trim with the following characteristics: - Cord/tensioning cable torn - Cord/tensioning cable worn…
- 11013192Jan 24, 2025Complaint Fuel door may require several attempts to open. Please note that if the complaint "Fuel filler flap not opening" occurs, it is important to check the fuel filler flap…
- 11013185Jan 24, 2025Complaint Paint damage on door paneling in area of door handle (see picture 1). Cause Alignment of door handle bearing bracket is not correct. Remedy 1. Paint the affected area…
- 11013184Jan 24, 2025Complaint Noise from area of instrument panel Noise might occur in the following conditions: - At engine speeds of 1500 rpm to 2000 rpm. - In the speed range up to 45mph - Type…
- 11013347Jan 23, 2025Complaint Wind or airflow noises in the area of the doors Cause Airflow noises or tire noise. The noises entering the interior may be perceived as too loud. Remedy MODEL…
- 11009122Oct 23, 2024Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump…
Body and structure: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 1 | 5% |
| 2022 | 1 | 4% |
| 2020 | 4 | 12% |
| 2019 | 7 | 10% |
| 2018 | 14 | 14% |
| 2017 | 24 | 11% |
| 2016 | 28 | 10% |
| 2015 | 60 | 16% |
| 2014 | 9 | 10% |
| 2013 | 58 | 22% |
| 2012 | 55 | 21% |
| 2011 | 49 | 10% |
| 2010 | 34 | 8% |
| 2009 | 27 | 5% |
| 2008 | 9 | 1% |
Other parts of the 2018 Mercedes-Benz C300
34 complaintsOther or unknown
23 complaintsSteering
12 complaintsElectrical system
10 complaintsFuel system
10 complaintsAir bags
4 complaintsForward collision avoidance
4 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsBrakes
2 complaintsExterior lighting
2 complaintsTires
2 complaintsTransmission and drivetrain
2 complaints
← All problems reported for the 2018 Mercedes-Benz C300
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology