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Other or unknownPart report

2012 Mercedes-Benz C300 Other or unknown Problems

Complaints
23about this part
Share
9%of 267 total for the year
Median mileage
—not reported
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 23 complaints about the other or unknown of the 2012 Mercedes-Benz C300, 9% of the 267 complaints for this model year.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I started hearing noises about a week ago while driving. Last night while driving home in the evening traffic, I braked and car violently jerked and veered to the right almost hitting the car in the front. I took the car to a shop this morning and they found that the rear subframe had collapsed due to rust and advised the car was extremely dangerous to drive.”

NHTSA complaint #11548575, filed 2023-10

“I drove over an object on the highway and noticed my car veering left and wobbly when turning. A week after, it is squealing like a load of piglets in my trunk whenever I go over a bump, then my battery light came on and I took it to the shop and contacted my insurance, who denied my claim saying it was 'wear and tear'.”

NHTSA complaint #11459967, filed 2022-04

“Rear subframe rotted out and broke due to corrosion. Rear crossmember is broken and needs replaced. My safety as well as the safely of other was put at risk. Loss of control at high speed could have been deadly. Luckily, I wasn’t going very fast at the time of incident or else who knows what would have happened to me or bystanders. Independent service center inspected and confirmed that incident was due to corrosion in the rear. …”

NHTSA complaint #11682005, filed 2025-08

“I was driving on the highway and came to a sudden stop and the car fishtailed putting our safety and the safety of others at risk. I brought my car to a mechanic and I changed my tires. When I went for a wheel alignment the mechanic found that the K bar subframe was corroded and cracked. There was no warning prior to the failure. I had no idea there was a problem because the K bar is behind the snow flap and was hidden.”

NHTSA complaint #11532607, filed 2023-07

“My rear subframe has corroded and has snapped, which is a major safety issue as while driving when I come to a stop the rear end of the car swags sideways. It do not stop straight.”

NHTSA complaint #11551154, filed 2023-10

Other or unknown: other model years

YearComplaintsShare of year
2024327%
2023418%
202228%
2020515%
20191014%
20182323%
20173617%
20166522%
20156317%
201489%
2013197%
2012239%
2011337%
2010276%
2009315%
2008386%

Other parts of the 2012 Mercedes-Benz C300

Air bags
114 complaints
Suspension
69 complaints
Body and structure
55 complaints
Brakes
15 complaints
Electrical system
12 complaints
Fuel system
12 complaints
Steering
8 complaints
Engine
5 complaints
Transmission and drivetrain
5 complaints
Exterior lighting
4 complaints
Wheels
4 complaints
Visibility (wipers, defrost, mirrors)
3 complaints

← All problems reported for the 2012 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