2012 Mercedes-Benz C300 Structure & Body Problems
NHTSA lists 54 Structure & Body complaints for the 2012 Mercedes-Benz C300, 20% of all complaints filed for the year, with a median failure mileage of 110,000. Most describe rear subframe corrosion; there is no related recall on file, and one injury has been reported.
- Structure & Body complaints
- 54
- 20% of 266
- Crashes reported
- 0
- Fires reported
- 0
- Injuries reported
- 1
- Median mileage
- 110,000 mi
- Related recalls
- 0
Typical body and structure symptoms owners report
- Owners report the rear subframe (K-frame) rusting through or developing holes, sometimes failing state safety inspections.
- Several describe the vehicle swerving or pulling to one side when braking, later traced to a corroded subframe or a stabilizer arm detaching from it.
- Some report loud clicking or abnormal noise from the rear of the vehicle at highway speed, linked to subframe or suspension corrosion.
- One owner reported a crooked, vibrating steering wheel and side-to-side rear shaking while braking at highway speed.
- One early complaint described a loud, abnormal noise from the rear passenger window at low speed, unrelated to corrosion.
When 2012 Mercedes-Benz C300 body and structure complaints were filed
First complaint Aug 1, 2012, latest Nov 24, 2025.
Structure & Body recalls for the 2012 Mercedes-Benz C300
No safety recalls on record for this model year.
Structure & Body complaints by C300 model year
Raw complaint counts per model year; newer years have had less time to accumulate complaints.
Frequently asked questions
- Is rear subframe corrosion common on the 2012 Mercedes-Benz C300?
- NHTSA lists 54 Structure & Body complaints for this model year, and most sample complaints describe rear subframe rust or corrosion, often found during service or state inspection.
- Is there a recall for the 2012 C300 subframe issue?
- No related recall is listed in this data for the 2012 Mercedes-Benz C300 Structure & Body area.
- At what mileage do structure and body problems typically show up?
- The median mileage at failure for Structure & Body complaints on the 2012 C300 is 110,000 miles.
- How does the 2012 C300 compare to other years for this problem?
- The 2012 model year has 54 Structure & Body complaints (20% share), similar to 2011 (53 complaints, 11%) and 2013 (58 complaints, 22%), suggesting the issue spans multiple model years.
- Has the subframe corrosion caused any crashes or injuries?
- NHTSA records 0 crashes and 1 injury tied to Structure & Body complaints for the 2012 C300.