C-Class (W203)
Data covers 2 NHTSA model names
Reliability Score
Complaints by Engine Code
2.5-V6-Gas
2.5L 6-cylView details
Complaint Breakdown
1.8-I4-Gas
1.8L 4-cyl / 189 hpView details
Complaint Breakdown
Mercedes-Benz C-Class Unidentified Engine
View details
Complaint Breakdown
3.2-V6-Gas
3.2L 6-cyl / 215 hpView details
Complaint Breakdown
2.6-V6-Gas
2.6L 6-cyl / 168 hpView details
Complaint Breakdown
3.0-V6-Gas
3.0L 6-cylView details
Complaint Breakdown
2.3-I4-Gas
2.3L 4-cyl / 192 hpView details
Complaint Breakdown
3.5-V6-Gas
3.5L 6-cylView details
Complaint Breakdown
5.4-V8-Gas
5.4L 8-cyl / 362 hpView details
Complaint Breakdown
Owner Complaints by System
Complaints owners filed with NHTSA about the Mercedes-Benz C-Class, counted across every engine. A complaint can name more than one system.
What to check on a used 2001-2007 Mercedes-Benz C-Class
On a used 2001-2007 Mercedes-Benz C-Class, the systems with the most NHTSA owner complaints are the engine (222), the airbags and driver-assist systems (178) and the fuel system (158). Each one has an inspection step below, with counts as of 2026-10-12. A complaint is an owner report, not a confirmed defect, and counts rise with sales.
- Start the engine cold and listen for the first 30 seconds, then again at idle once it is warm.Costly repair. NHTSA has 222 owner complaints on the 2001-2007 Mercedes-Benz C-Class about the engine, all engines combined.
- Switch the ignition on and watch the airbag light. On the drive, check the backup camera and any collision or lane warning.Safety. NHTSA has 178 owner complaints on the 2001-2007 Mercedes-Benz C-Class about the airbags and driver-assist systems.
- Let the engine idle for five minutes, walk around the car and smell for fuel.Safety. NHTSA has 158 owner complaints on the 2001-2007 Mercedes-Benz C-Class about the fuel system, all engines combined.
- Switch on every electrical item in turn: lights, windows, locks, wipers, climate fan, screen and power outlets.Costly repair. NHTSA has 152 owner complaints on the 2001-2007 Mercedes-Benz C-Class about the electrical system.
- Accelerate gently through every gear, then once at full throttle. Shift into Reverse and back to Drive.Costly repair. NHTSA has 138 owner complaints on the 2001-2007 Mercedes-Benz C-Class about the transmission and drivetrain, all engines combined.
Recalls (5)
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2001-2011 C-Class, CLK, E-Class, and CLS vehicles. Please see the recall report for a complete list of models and model years. The glass sunroof panel may not be properly secured and can detach.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2001-2011 C-Class, CLK, E-Class, and CLS vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The glass sunroof panel may not be properly secured and may detach.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2007 C350, C230, C280, CLK350, E320CDI, E350 Wagon, E350, 2006 C55 AMG, CLK500, CLS500, CLS55 AMG, E500 Wagon, E500, E55 AMG, 2007 CLK550, CLS550, CLS63 AMG, E550, E63 AMG, and E63 Wagon AMG vehicles. The bonding between the glass panel and the sliding roof frame may deteriorate, possibly causing the glass panel to detach from the vehicle.
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2001-2011 vehicles. The bonding between the glass panel and the sliding roof frame may deteriorate, possibly resulting in the glass panel detaching from the vehicle. For a full list of the affected models visit: https://static.nhtsa.gov/odi/rcl/2019/RMISC-19V918-4126.pdf
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2009-2010 ML320 BlueTec 4Matic, GL320 BlueTec 4Matic and R320 CDI 4Matic, 2011 E350 Cabriolet and E550 Cabriolet, 2009-2011 ML350, ML350 4Matic, ML550 4Matic, ML63 AMG, and C63 AMG, 2010-2011 ML450 4Matic Hybrid, E350 Coupe, E350 4Matic, E550 Coupe, E550 4Matic, and E63 AMG, 2011-2012 GL350 BlueTec 4Matic and R350 BlueTec 4Matic, 2009-2012 GL450 4Matic, GL550 4Matic and R350 4Matic, 2007-2008 SLK280, SLK350, and SLK55 AMG, 2011-2014 SLS AMG Coupe, 2012 SLS AMG Cabriolet, 2013-2014 SLS AMG GT and SLS AMG GT Cabriolet, 2005 C230 Kompressor and C320, 2006-2007 C230, 2006-2011 C350, 2008-2011 C300 and C300 4Matic, 2010-2012 GLK350 and GLK350 4Matic and 2007-2008 Chrysler Crossfire vehicles. Upon deployment of the driver's frontal air bag, excessive internal pressure may cause the inflator to rupture.
All Generations
Alternatives in Compact Sedan
Frequently Asked Questions
What are the most common 2001-2007 Mercedes-Benz C-Class complaints?
Owners have filed 935 complaints with NHTSA about the 2001-2007 Mercedes-Benz C-Class. The systems they name most often are the engine, the safety systems and the fuel system.
Is the 2001-2007 Mercedes-Benz C-Class a good used car?
That depends on the model year, the mileage and the maintenance history of the car in front of you. Owners have filed 935 complaints with NHTSA about the 2001-2007 Mercedes-Benz C-Class. Check which systems they name most often and whether a recall is still open on that car.
How many NHTSA complaints does the 2001-2007 Mercedes-Benz C-Class have?
NHTSA has 935 owner complaints on file for the 2001-2007 Mercedes-Benz C-Class as of the latest data pull. A complaint is an owner's report, not a confirmed defect, and counts rise with sales.
What recalls affect the 2001-2007 Mercedes-Benz C-Class?
NHTSA lists 5 recalls covering some 2001-2007 Mercedes-Benz C-Class vehicles. Which ones apply depends on the VIN: enter it at nhtsa.gov/recalls to see the open campaigns on a specific car.
What should I check before buying a used Mercedes-Benz C-Class?
Run the VIN through NHTSA's recall lookup and confirm every open recall has been done. Look hardest at the engine, the safety systems and the fuel system, the systems owners complain about most. Ask for maintenance records, have an independent mechanic inspect the car and run a vehicle history report for prior accidents and title issues.
Does the C-Class have NHTSA crash test ratings?
NHTSA has not published crash test ratings for the 2001-2007 Mercedes-Benz C-Class. Not all vehicles are tested each year. For the latest NHTSA safety information, visit nhtsa.gov/ratings.
Data from NHTSA federal complaints database. 935 complaints analyzed. Data confidence: high. Last updated: 2026-10-12.