2017 Mercedes-Benz C300 Other or unknown Problems
- Complaints
- 36about this part
- Share
- 17%of 216 total for the year
- Median mileage
- 4,250miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 36 complaints about the other or unknown of the 2017 Mercedes-Benz C300, 17% of the 216 complaints for this model year. Where a mileage was given, the median is 4,250 miles. 2 of these say a crash was involved and 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“In late october 2019, I was driving on the freeway at 70 MPH. My panoramic sunroof suddenly blow up with a loud sound. Mercedes claimed that a rock or someone shot bbgun at my car. However, I read from multiple sources that this happen often with the mercedes's panoramic roof. Lucky for me, my family was not in the car at the time.”
NHTSA complaint #11297509, filed 2020-01, 41,000 miles“I had an injury in the military and it left me with some form of tbi. The chemicals in the car from the time of purchase to the time of sell left me with a large amount of amnesia and at times pain throughout the body, its not something that's easily remedied. The times from the chemicals in the vehicle always caused a problem. I don't know what else to do.”
NHTSA complaint #11231677, filed 2019-07, 10 miles“My windshield cracked the 2nd day I had the vehicle. Sept 2017 . I have informed the mb mechanic several times and he did nothing after many failed attempts with mercedes of el cajon I asked to be placed with a new service advisor. Recieved my new windshield in feb 2018 already having problems. Little cracks are starting to form again. Not happy with my purchase. Definitly not happy with this dealership.”
NHTSA complaint #11074083, filed 2018-02, 6,000 miles“So I just got my mercedes benz C300 4matic I only have 44,711 miles on it and I barely drive it, so today I was driving and the whole day things were great and I stopped at a store got back in and it says 'power steering malfunction' I was on a street in the city, I'm on confused on how this is happening to a car I just got from the dealership that is practically new, now let me mention that this is a on and off issue through out this whole day it has came on and off twice”
NHTSA complaint #11415611, filed 2021-05, 44,771 miles“Windshield quality does not meet my expectation. My windshield cracked within a couple months by a piece of rock on the road while driving on freeway.”
NHTSA complaint #11042803, filed 2017-11, 2,500 milesRelated service bulletins
- 11035780Aug 4, 2026Complaint Mercedes-Benz USA is currently experiencing limited availability of transmission fluid specification ATF 236.17 due to a global supply constraint. 236.17 ATF 1L and 5L…
- 11028809Feb 13, 2026Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the TIREFIT sealant bottle may not meet specifications. The…
- 10179966Jul 31, 2020Incorrect time and/or instrument cluster message "SOS, service not activated" and/or Mercedes Me connect services nonfunctional
- 10205156Aug 26, 2016Intial startup not possible after replacement of transmisson 725.0 or of electrohydraulic controller unit.
- 10205154Aug 5, 2016Gasket may settle causing a slight oil leak.
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 3 | 27% |
| 2023 | 4 | 18% |
| 2022 | 2 | 8% |
| 2020 | 5 | 15% |
| 2019 | 10 | 14% |
| 2018 | 23 | 23% |
| 2017 | 36 | 17% |
| 2016 | 65 | 22% |
| 2015 | 63 | 17% |
| 2014 | 8 | 9% |
| 2013 | 19 | 7% |
| 2012 | 23 | 9% |
| 2011 | 33 | 7% |
| 2010 | 27 | 6% |
| 2009 | 31 | 5% |
| 2008 | 38 | 6% |
Other parts of the 2017 Mercedes-Benz C300
77 complaintsFuel system
33 complaintsElectrical system
31 complaintsBody and structure
24 complaintsSeat belts
21 complaintsAir bags
15 complaintsSteering
13 complaintsTransmission and drivetrain
12 complaintsVisibility (wipers, defrost, mirrors)
9 complaintsForward collision avoidance
3 complaintsBrakes
2 complaintsEngine cooling
2 complaints
← All problems reported for the 2017 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