FaultScore

Mercedes Benz C300 problems

Owners have filed 1,788 complaints about the Mercedes Benz C300 with NHTSA across model years 2008 to 2009. More of them are about the airbags than anything else.

Every Mercedes Benz C300 year, graded

The grade compares each year against the rest of this model's own run — never against another car. Click any bar or row to open that year's report.

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded
Year Grade Complaints Crashes Fires Median miles Most reported
2009 846 22 30 70,140 Electrical System
2008 942 25 23 78,921 Airbags

What breaks on a Mercedes Benz C300

Across every model year on file. Follow a row for that part's complaints and the year it was worst.

Airbags 459 25.7%

Worst in 2008

Electrical System 428 23.9%

Worst in 2008

Steering 273 15.3%

Worst in 2009

Lights 228 12.8%

Worst in 2009

Worst in 2008

Worst in 2008

Suspension 49 2.7%

Worst in 2009

Brakes 38 2.1%

Worst in 2009

Worst in 2009

Worst in 2009

Seat Belts 30 1.7%

Worst in 2008

Transmission & Drivetrain 21 1.2%

Worst in 2008

Acceleration & Cruise Control 16 0.9%

Worst in 2008

Tires 14 0.8%

Worst in 2009

Exactly what failed on a Mercedes Benz C300

The named sub-assemblies behind those complaints, across every model year.

Body 22 41.5%
Headlights 5 9.4%
Frame AND Members 5 9.4%
Pressure Monitoring AND Regulating Systems 4 7.5%
Tail Lights 4 7.5%
Switch 3 5.7%
Column 3 5.7%
Ignition 3 5.7%
Subframe/Mounting Bracket 2 3.8%
Front Passenger 2 3.8%

Complaints filed over time

Every complaint about every Mercedes Benz C300, by the month it reached NHTSA.

Apr 2008 peak 62 May 2026

Mercedes Benz C300 problems by state

Where owners filed from. Heavier states are usually just bigger markets, but a part that fails in heat or salt shows up here first.

Compare the Mercedes Benz C300

Side by side on complaint history. Remember that raw totals track how many were sold as much as how good they were.