2012 Mercedes-Benz C204.9 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2012 Mercedes-Benz C204.9, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Electrical133.3%
- Engine133.3%
- Steering133.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
MY VEHICLE AND MANY OTHER MERCEDES BENZ MODELS SUFFER A FAILED ELECTRONIC IGNITION SWITCH AND ELECTRONIC STEERING LOCK. THIS IS A KNOWN DEFECT AMONGST MANY MODELS/YEARS OF MERCEDES BENZ VEHICLES AND ONLY A DEALER CAN REPAIR. THE COST OF REPAIR IS $1,900. THE CAUSES THE VEHICLES TO BE UNABLE TO START, AND VERY CLEARLY, A MANUFACTURER DEFECT.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
TIMING CHAIN TENSIONER ALL OIL CHANGES WERE DONE PERFECTLY WITH THE CORRECT OIL AND ORIGINAL FILTER.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
MY VEHICLE AND MANY OTHER MERCEDES BENZ MODELS SUFFER A FAILED ELECTRONIC IGNITION SWITCH AND ELECTRONIC STEERING LOCK. THIS IS A KNOWN DEFECT AMONGST MANY MODELS/YEARS OF MERCEDES BENZ VEHICLES AND ONLY A DEALER CAN REPAIR. THE COST OF REPAIR IS $1,900. THE CAUSES THE VEHICLES TO BE UNABLE TO START, AND VERY CLEARLY, A MANUFACTURER DEFECT.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .