The C300 Sport is a capable car and was more competitively priced than the 2001-2007 model it replaces. Quick and refined, braking performance is excellent, but the steering is overly light and feels out of place in a sport sedan. The taut suspension translates into a stiffer ride than many competing models.
Alerts
There are 7 recalls on this vehicle. Learn More.

Road Test Results

Performance
Acceleration Acceleration Acceleration tests are conducted on a smooth, flat pavement straightaway at the track. Time, speed, and distance measurements are taken with a precise GPS-based device that’s hooked to a data-logging computer.
0 to 60 mph 0 to 60 mph (sec.) The time in seconds that a vehicle takes to reach 60 mph from a standstill with the engine idling.
Transmission Transmission Transmission performance is determined by shifting smoothness, response, shifter action, and clutch actuation for manual transmissions.
Fuel Economy Fuel Economy We perform our own fuel-economy tests, independent of the government's often-quoted EPA figures and the manufacturers' claims. Using a precise fuel-flow measuring device spliced into the fuel line, we run two separate circuits to represent city and highway consumption.
CR's Overall Mileage CR's Overall Mileage CR's overall mileage is a composite of measured fuel usage on a prescribed city course and highway cruising; and CR's 150-mile test trip of mixed driving, if tested. In recent road tests, we've discontinued the 150-mile trip test.
CR's City Mileage CR's City Mileage Measured fuel usage on a prescribed city course.
CR's Highway Mileage CR's Highway Mileage Measured fuel usage on a prescribed highway cruising.
Annual Fuel Cost Annual Fuel Cost The cost and amount of fuel used in 12,000 miles and is calculated from CR's overall mileage.
Braking Braking The braking rating is a composite of wet and dry stopping distances and pedal feel. Braking distance is from 60 mph, with no wheels locked.
Emergency Handling Emergency Handling Several factors go into the rating, including the avoidance maneuver speed and confidence, as well as how the vehicle behaves when pushed to its limit.
Comfort / Convenience
Ride Ride Our expert judgment of how well the suspension isolates and absorbs road imperfections and how steady it keeps the body on various road surfaces.
Noise Noise Our expert judgment of the vehicle's interior noise level in everyday driving.
Front Seat Comfort Front Seat Comfort Our judgment of how comfortable the front seat is for drivers of various heights.
Rear Seat Comfort Rear Seat Comfort Our judgment of how comfortable the rear seat is for two passengers to sit across.
Interior Fit and Finish Interior Fit and Finish An expert evaluation of the interior quality and craftsmanship.
Trunk/Cargo Area Trunk/Cargo Area Our rating is based on the amount of luggage or cargo space that a vehicle has in the trunk or cargo area.

Owner Reports

Worse Better
Reliability History Reliability History The reliability charts are based on responses on hundreds of thousands of vehicles from our latest Annual Auto Survey. Consumer Reports subscribers reported on any serious problems they had with their vehicles during the past 12 months that they considered serious because of cost, failure, safety, or downtime, in any of the trouble spots included in the table below. The results are presented relative to the average model that year. Extra weight is given to the more serious areas such as major engine or transmission problems. Based on this data and further analysis, we predict reliability for the latest year. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
2000
NA
2001
NA
2002
NA
2003
NA
2004
NA
2005
NA
2006
NA
2007
NA
2008
2009
NA
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Reliability Trouble Spots
Engine Major Engine Major Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.
NA
Engine Minor Engine Minor Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.
NA
Engine Cooling Engine Cooling Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.
NA
Transmission Major Transmission Major Transmission rebuild or replacement, torque converter, clutch replacement.
NA
Owner Satisfaction Owner Satisfaction To learn about satisfaction, CR has collected survey data from our annual survey on more than half a million vehicles. Our subscribers provide great insights into their satisfaction by answering one simple question: If they had it to do all over again, would they definitely buy or lease the same model? In addition, respondents also rate their cars in six categories: driving experience, comfort, value, styling, audio, and climate systems. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
2000
NA
2001
NA
2002
2003
NA
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Driving Experience Driving Experience Includes acceleration and handling
Comfort Comfort Includes seats, climate control, noise, and ride
Value Value Did you get what you wanted relative to the price you paid?
Styling Styling How it looks inside and out
Safety Equipment
ABS and front side air bags standard. Rear side air bags standard from 2001-2007. Head protection air bags standard from 2001. ESC standard from 2000.
Road Test

The C300 Sport is a capable car and was more competitively priced than the 2001-2007 model it replaces. Quick and refined, braking performance is excellent, but the steering is overly light and feels out of place in a sport sedan. The taut suspension translates into a stiffer ride than many competing models. We also tested the base C250, powered by an exceptionally smooth, 201-hp, turbocharged four-cylinder engine that was new for 2012. It serves up ample power, but its average fuel use of 24 mpg is not exactly stellar. We liked the steady, supple ride and agile handling in the Luxury trim we tested. It was more comfortable riding and about as agile as the Sport version of the six-cylinder C300. For both versions, the cabin remains snug, but it's quiet with supportive seats. The controls are better than those on most Mercedes, yet some are not logical to use.

Seating
2 front, 3 rear
Drive Wheels
AWD , Rear
Warranty

In most cases, automotive warranties are based on the vehicle identification number (VIN), and the warranty will be valid regardless of ownership. The dealership can tell you exactly how much warranty is left.

Read more about extended warranties
Body Styles
sedan
Transmissions Available
  • 7-speed Automatic
  • 6-speed Manual
Engines Available
  • 3-liter V6 (228 hp)
  • 3.5-liter V6 (268 hp)
  • 6.3-liter V8 (451 hp)

Owner Reported Trouble Spots

The Reliability score is based on our latest subscriber survey of 2010 Mercedes-Benz C-Class owners. The owner comments describe problems respondents experienced with this vehicle.

Electric System

Alternator, starter, hybrid battery and related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, distributor or rotor failure, spark plugs and wires failure.

What Owners Say

Alarm or security system (excluding aftermarket systems)

"car would not start because security system lost communication with the steering column and key"

Anonymous, SC (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Exterior lights (other than headlights)

"Rear tail light bulb receptacles on both rear tail lights disintegrated. This however was on a factory recall--so it was not a surprise problem"

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Electrical relay replacement"

Anonymous, TX (2010 Mercedes-Benz C-Class C300 3.5-L V6)

"tail lights kept burning out, then Mercedes replaced a harness with a recall which solved the problem"

Anonymous, NC (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Recall to replace bulb holders"

Anonymous, BC (2010 Mercedes-Benz C-Class C300 3.5-L V6)

"The warning comes up on screen: indicator light needs replacing, etc, dealer visit req'd, they fix the problem but it comes back, at least 4 times in 2 years"

David C., ON (2010 Mercedes-Benz C-Class 3.0-L V6)

"One tail light failure due to factory defect. Both tail light assemblies replaced free under factory recall"

Anonymous, SC (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Rear lights recall replaced ok. number plate lights bad connection in socket ongoing. Front fog light broken with a stone, had to replace complete unit. MB dealer $400 did it myself $50"

Anonymous, TX (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Complete failure of both rear lighting harnesses. Caused many light bulb failures before recall was issued. it is being repaired under recall now"

Joshua M., CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Random lights would burn out and also random lights would be on when the car is off"

Tom K., MD (2010 Mercedes-Benz C-Class C300 3.5-L V6)

"Brake lights stuck on due to computer failure that operates brake lights"

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.5-L V6)

"The parking light above the headlight, sometime it will went out, but next time you start the car, it come back, it happen for few times, like every half year"

Anonymous, MA (2010 Mercedes-Benz C-Class C350 3.5-L V6)

"Minor problem.One of two license plate lights"

Anonymous, ON (2010 Mercedes-Benz C-Class)

"Front parking lights created so much heat 1 of 2 on each side melted the sockets. Additionally, (and possibly due to the parking light not functioning) the computer detects a malfunction with the front left turn signal, front left fog light and left side marker lights. Service tech says it is not possible to know if it is a problem related to the parking lights being burned out, a control unit or something else entirely. The only way to fix is to start replacing parts until the issue is resolved."

Anonymous, FL (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Headlights

"Two separate low beam burnouts. One replaced under warranty; one paid for by me at a cost of around $50"

Anonymous, SC (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Burn out frequently"

Tom K., MD (2010 Mercedes-Benz C-Class C300 3.5-L V6)

"Parking bulb broke off of housing resulting in having to replace entire Front headlamp assembly for a cost of over $900"

Anonymous, NY (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Constantly going out"

Anonymous, VA (2010 Mercedes-Benz C-Class C300 3.5-L V6)
Keyless entry

"One of the door locks would not lock remotely"

Larry R., TX (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Tire pressure monitor

"Inaccurate readings. Also inconsistent from initial start up to start up. Had to go do dealership to correct problem."

Anonymous, MA (2010 Mercedes-Benz C-Class C300 3.5-L V6)

Fuel System

Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.

What Owners Say

Emission control devices (includes EGR)

"Car would not start after filling with gas. Took it to the dealer and emission valve was replaced, no problems thereafter"

Anonymous, VT (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"At 56,000 replaced a part that control emissions...dealer stated it was not under warranty. Dealer wanted to charge $1200 to replace part....got second opinion at a local private garage, worked done for $450.00"

Nydia R., NH (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Fuel cap

"Fuel cap was not sealing properly; replaced it"

Jason N., TX (2010 Mercedes-Benz C-Class C350 3.5-L V6)
Fuel gauge/sender

"Fuel tank started leaking at sender unit. Work was covered under California 8 year emissions warranty"

Rex M., CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Fuel sender at gas tank leaked"

Rex M., CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Fuel injection system

"Value vent cap failed creating small oil leak which I noticed immediately. Relatively inexpensive repair ~$200 resolved the problem"

Anonymous, FL (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Sensors (includes O2 or oxygen sensor)

"vapor canister valve and some other related part quit functioning causing the car not to start after a fuel fill up. Would have to turn key on, try to start, then turn key off, then try to start again. it would finally start"

Anonymous, SC (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"I replaced an O2 sensor in Feb 17 at a cost of $1350 at a local MB dealer. The sensor failed again with less than 24 months and less than 10K miles. When I realized that this was the second O2 sensor, I contacted the dealer and he agreed to reimburse me for the cost of the second sensor. My concern - why does any O2 sensor cost $1350?"

Kevin W., VA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

Brakes

Antilock system (ABS), parking brake, master cylinder, calipers, rotors, pulsation or vibration, squeaking, brake failure or wear.

What Owners Say

Antilock system (ABS)

"ABS Module replaced"

Carl S., TX (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Normal routine brake wear

"No problem encountered. Brake warning light came on and front brakes and rotors replaced as needed. Rears were OK."

Anonymous, VA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Routine replacement of front brake pads and service calipers."

Anonymous, VA (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Premature brake wear

"I have never had a car wear down brakes so quickly - needed front rotors at 45000 miles - I had a much bigger heavier 2003 Range Rover that didn't need brakes until 75,000, so it's not my driving. The mechanic said it is the Mercedes "high performan"

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Brakes & rotors premature"

Anonymous, MA (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Regular brake failure

"This is NOT a problem! 80,000 miles rear brakes are down to replacement thickness. No surprise, excellent performance - ongoing. Have a few weeks to replace rotors pads and sensors. Consider this to be regular wear and replacement. 15 years ago would have machined rotors. Today …. a replacement item like the disc pads."

Anonymous, TX (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Rotors

"Premature wear less than"

Anonymous, MA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

Climate System

Blower (fan) motor, A/C compressor, condenser, evaporator, heater system, automatic climate control, refrigerant leakage, electrical failure.

What Owners Say

A/C compressor

"The AC wasn't working properly"

Janine F., NY (2010 Mercedes-Benz C-Class C300)

"A/C compressor went bad in the first year. The A/C has been fine ever since."

D U., FL (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Blower (fan) motor

"Blower motor replace by dealer under warranty with only 26,000"

Nydia R., NH (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"blower quit working ,had to have it replaced"

Anonymous, SC (2010 Mercedes-Benz C-Class C300)

"blower motor seized in the morning, but if the car hit a bump or a pot hole, it will running fine, I end up replace it with a new blower motor and the air conditioning works fine after that"

Anonymous, MA (2010 Mercedes-Benz C-Class C350 3.5-L V6)

Drive System

Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.

What Owners Say

4WD/AWD components

"Great difficulty to get the correct front axels replaced at the dealer"

Anonymous, FL (2010 Mercedes-Benz C-Class C300 3.5-L V6)
Driveshaft or axle

"Rear axle seals failed after only 55,000 miles"

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Electrical failure

"Computer that operates steering wheel went out very expensive to replace"

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.5-L V6)
Transfer case

"There was leaky seal in the transfer case"

Christopher B., MA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Transfer case seals leak. Very expensive repair"

Anonymous, FL (2010 Mercedes-Benz C-Class C300 3.5-L V6)

Suspension

Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.

What Owners Say

Power steering leaks

"Power steering reservoir (plastic) failed leading to loss of fluid and need to replace both reservoir and, based on potential for hidden damage from the lack of fluid, the power steering pump as well"

Anonymous, AZ (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Power steering pumps and hoses

"Steering became noisier (whining, moaning sound), and eventually I noticed drip marks below the car. It turned out it was under recall for this problem but had not been repaired"

Anonymous, ON (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Power steering pump leaked and had to be replaced"

Jason N., TX (2010 Mercedes-Benz C-Class C350 3.5-L V6)
Shocks or struts

"very stiff ride so had to replace one shock and strut--had to be done twice very rough ride"

Anonymous, ON (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Both read Shocks lost oil. Had to be replaced under extended Waranty. 5 years seems short"

Yves B., QC (2010 Mercedes-Benz C-Class C350 3.5-L V6)

Engine Minor

Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.

What Owners Say

Engine mounts

"3 mounts failed, $900 to repair"

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"had them replaced - expensive"

Anonymous, FL (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"normal Mercedes issue with hydraulic motor mounts lasting about 3-4 years per set"

Les F., FL (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"worn 0ut replacement"

Anonymous, FL (2010 Mercedes-Benz C-Class C300 3.0-L V6)

Exhaust

Muffler, pipes, catalytic converter, exhaust manifold, leaks.

What Owners Say

Other/unsure

"control knob malfunctioned"

Anonymous, CT (2010 Mercedes-Benz C-Class C300)

"still waiting for court issued repair on airbag. taken three time to have replaces (see class action ruling) but part not available"

Don C., NY (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"Recall based on manufacturing issue"

Charles B., CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

Engine Cooling

Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.

What Owners Say

Thermostat

"check engine light came on. Easy fix"

Roger L., CT (2010 Mercedes-Benz C-Class C300 3.0-L V6)

"So the check engine light come on and then the next day I drove it to the dealership, it turns out the Thermostat is bad and they change it, engine works fine since then"

Anonymous, MA (2010 Mercedes-Benz C-Class C350 3.5-L V6)

Transmission Minor

Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.

What Owners Say

Rough shifting

"put foot on the gas and nothing happens then car clunks into gear and takes of - very dangerous in stop and go traffic, makes it hard to change lanes safely when you can't get out of peoples way in time"

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Transmission leaks

"Transaxle aft gasket leaked. Cheap part but $500 fix due to labor. was noticed during oil change"

Anonymous, ON (2010 Mercedes-Benz C-Class C300 3.0-L V6)

Body Integrity

Squeaks, rattles, wind noises, loose or cracked seals and/or weather-stripping, air and water leaks.

What Owners Say

Air or water leaks

"Water leak when it rains caused the car to short out. Dealer cannot locate the source of the leak"

Anonymous, IL (2010 Mercedes-Benz C-Class C300 3.0-L V6)
Squeaks or rattles

"intermittent noise from the front of the car"

Lawrence G., BC (2010 Mercedes-Benz C-Class C300 3.0-L V6)

Paint/Trim

Paint (fading, chalking, cracking, or peeling), loose interior and exterior trim or moldings, rust.

What Owners Say

Paint (fading, chalking, cracking, or peeling)

"Paint peeled after exposure to sun."

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

In-car Electronics

CD or DVD players, radio, speakers, GPS, communication system (e.g., OnStar), display screen freezes or goes blank, phone pairing (e.g. Bluetooth), voice control commands, steering wheel controls, portable music device interface (e.g., iPod/MP3 player), backup or other camera/sensors.

What Owners Say

Radio

"Jumps from station to station at times"

Anonymous, CA (2010 Mercedes-Benz C-Class C300 3.0-L V6)

Transmission Major

Transmission rebuild or replacement, torque converter, clutch replacement.

What Owners Say

Transmission rebuild or replacement

"Noise developed"

Anonymous, QC (2010 Mercedes-Benz C-Class C300 3.0-L V6)

Engine Major

Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.

What Owners Say

Cylinder head

"replaced under warranty"

Anonymous, CA (2010 Mercedes-Benz C-Class C350 3.5-L V6)

Body Hardware

Power or manual windows, locks and latches, tailgate, hatch or trunk, doors or sliding doors, mirrors, seat controls, safety belts, sunroof, convertible top.

Power Equipment

Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, remote engine start, alarm or security system

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