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2003 Mercedes Benz C320

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

About this comparison →
22Owner complaints

Model-year median: 15

3Recall campaigns

View recall details →

0Investigations

View investigation details →

How this year compares

Owner complaints by model year

Other model years Selected year
63
200168
200222
200315
200415
20052
2006
Compare all C320 years →

Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

Electrical System
7Power Train
5Air Bags
4Engine And Engine Cooling
3Visibility
3
All reported categories
Exterior Lighting
2Fuel System, Gasoline
2Suspension
2Vehicle Speed Control
2Engine
1Equipment
1Fuel/propulsion System
1Latches/locks/linkages
1Seats
1Service Brakes
1Steering
1Structure
1

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

Limited mileage data: 15 of 22 reports include usable mileage. There isn’t enough coverage to show a useful chart.

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Electrical System. Review the 7 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Air Bags. Review the 4 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

2 crash reports1 fire reports2 injury reports

Engine And Engine Cooling complaints

3 reports
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50,026 miles · Apr 19, 2013
Engine And Engine CoolingPower Train

I HAVE A 2003 C 320 MBNZ, THE RADIATOR LEAKS INTO THE TRANSMISSION. THE RADIATOR NEEDS TO BE REPLACED. THIS LEAKING RADIATOR FLUID DAMAGED THE TRANSMISSION, AND IT HAS TO BE REPLACED. THIS PROBLEM CAUSED A LACK OF POWER AND THEREFORE A LOSS OF ACCELERATION. IT HAPPENED WITHOUT ANY WARNING, LEAVING YOU VULNERABLE DUE TO THE LOSS …

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I HAVE A 2003 C 320 MBNZ, THE RADIATOR LEAKS INTO THE TRANSMISSION. THE RADIATOR NEEDS TO BE REPLACED. THIS LEAKING RADIATOR FLUID DAMAGED THE TRANSMISSION, AND IT HAS TO BE REPLACED. THIS PROBLEM CAUSED A LACK OF POWER AND THEREFORE A LOSS OF ACCELERATION. IT HAPPENED WITHOUT ANY WARNING, LEAVING YOU VULNERABLE DUE TO THE LOSS OF POWER, A VERY DANGEROUS SITUATION WHICH MAY CAUSE AN ACCIDENT. THE CAR HAS ONLY 50026 MILES ON IT. *TR

NHTSA ODI #10508867

47,115 miles · Sep 27, 2009
Engine And Engine CoolingPower Train

ON A 2003 C 320 MBNZ, THE RADIATOR NOW LEAKS INTO THE TRANSMISSION. THIS IS GOING TO REQUIRE THE RADIATOR TO BE REPLACED AND FOR THE TRANSMISSION TO BE FLUSHED. THIS LEAKING RADIATOR FLUID COULD HAVE ALREADY DAMAGED THE TRANSMISSION, AND IF SO, IT WILL HAVE TO BE REPLACED. THIS PROBLEM CAUSES A LACK OF POWER AND THEREFORE A LO…

Read full complaint

ON A 2003 C 320 MBNZ, THE RADIATOR NOW LEAKS INTO THE TRANSMISSION. THIS IS GOING TO REQUIRE THE RADIATOR TO BE REPLACED AND FOR THE TRANSMISSION TO BE FLUSHED. THIS LEAKING RADIATOR FLUID COULD HAVE ALREADY DAMAGED THE TRANSMISSION, AND IF SO, IT WILL HAVE TO BE REPLACED. THIS PROBLEM CAUSES A LACK OF POWER AND THEREFORE A LOSS OF ACCELERATION. IT HAPPENS WITHOUT ANY WARNING, OFTEN LEAVING YOU VULNERABLE DUE TO THE LOSS OF POWER, A POTENTIAL ACCIDENT WAITING TO HAPPEN. *TR

NHTSA ODI #10285432

54,352 miles · Jul 27, 2007
Engine And Engine Cooling

THIS HAPPENED IN MY 2003 C320 AT 54,000 MILES. I INITIALLY NOTICED A LIGHT RUBBING OR GRINDING WHILE ACCELERATING, WITH LIGHT VIBRATION. AT THE DEALERSHIP I WAS TOLD I WOULD NEED A NEW TORQUE CONVERTER, NEW RADIATOR, AND A FLUID FLUSH. THE RADIATOR FLUID WAS MIXING WITH THE TRANSMISSION FLUID. AFTER THOSE REPAIRS, MY C320 W…

Read full complaint

THIS HAPPENED IN MY 2003 C320 AT 54,000 MILES. I INITIALLY NOTICED A LIGHT RUBBING OR GRINDING WHILE ACCELERATING, WITH LIGHT VIBRATION. AT THE DEALERSHIP I WAS TOLD I WOULD NEED A NEW TORQUE CONVERTER, NEW RADIATOR, AND A FLUID FLUSH. THE RADIATOR FLUID WAS MIXING WITH THE TRANSMISSION FLUID. AFTER THOSE REPAIRS, MY C320 WAS STILL SHIFTING HARD AND THE GRINDING NOISE WAS STILL THERE. IT TURNS OUT THE TRANSMISSION WAS RUINED AS WELL. TWO REPLACEMENT TRANSMISSIONS WERE NEEDED UNTIL IT WAS READY TO BE PICKED UP. I'VE BEEN TOLD THAT THE MIXED FLUIDS ARE NOT UNCOMMON IN THIS MODEL AND YET MBUSA HAS MADE VERY LITTLE EFFORT TO ANSWER MY QUESTIONS. *TR

NHTSA ODI #10197622

Official recalls

3

24V874000 · Visibility:sun/moon Roof Assembly

Nov 19, 2024

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.

Consequence & remedy

Consequence: A detached sunroof panel can become a road hazard, increasing the risk of a crash.

Remedy: Dealers will inspect and replace the sunroof panel as necessary, free of charge. Owner notification letters were mailed January 10, 2025. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of previous NHTSA recall number 22V-954. MBUSA's number for this recall is 2024120001/2/3.

22V954000 · Visibility:sun/moon Roof Assembly

Dec 23, 2022

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.

Consequence & remedy

Consequence: A detached sunroof panel may become a road hazard, increasing the risk of a crash.

Remedy: Dealers will inspect and replace the sunroof panel as necessary free of charge. Owner notification letters were mailed February 3, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. This recall expands NHTSA recall number 19V-918. MBUSA's numbers for this recall are 2023010004, 2023010005, and 2023010006.

19V918000 · Visibility:sun/moon Roof Assembly

Dec 20, 2019

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

Consequence & remedy

Consequence: A detached glass panel can separate from the vehicle and become a road hazard, increasing the risk of a crash.

Remedy: MBUSA will notify owners, and dealers will inspect the glass panel bonding and replace the sliding roof, as necessary, free of charge. The recall began July 10, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020040011.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

0

No exact-year investigations in this snapshot.