2002 Mercedes-Benz C320 Problems
- Complaints
- 68filed with NHTSA
- Median mileage
- 70,000miles, 42 complaints with mileage
- Recalls
- 3campaigns on record
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
- NHTSA crash rating
- —overall rating starts with 2011 models
- EPA fuel economy
- 19 mpgcombined, 3.2L 6-cyl RWD · 17 city / 23 hwy
Sources: NHTSA records for the 2002 Mercedes-Benz C320 (complaints, recalls, investigations), EPA fuel economy. Report an error
What owners report
Owners of this model year most often report a battery that goes flat while the car sits, usually traced by dealers or shops to the seat control modules staying powered up. Lighting problems, ESP/BAS warnings and occasional transmission or fuel-system complaints also appear in the sample, mostly at moderate to high mileage.
- Seats
Battery drains while parked (seat control modules)
- 32 complaints (47%)
- median 74,500 mi at 7.3 yrs old (23 state mileage)
- owner-quoted repair $575 (median of 10 quotes)
- filed 2004–2024
Complaints describe the battery dying after the car sits overnight or for a few days, sometimes repeatedly even after a new battery or alternator. Owners say a dealer or independent shop traced the draw to the driver and/or passenger seat control module, and in many cases the module was unplugged to stop the drain, leaving the power seats and sometimes the steering wheel adjustment inoperable. Several mention quotes for replacement modules in the hundreds of dollars and that the same problem returned after repair. Reported across a wide mileage range, from roughly 12,000 to over 120,000 miles, typically after the car is parked for a day or more.
What to check: Ask whether the seat modules have been replaced or disconnected, and have a shop measure parasitic draw with the car locked and resting. Check that the power seats and steering wheel adjustment still work.
2 excerpts from owner complaints in NHTSA records
“Car stalled in the middle of the road and almost caused an accident. After 15 minutes, car started back. I had it diagnosed and a module was replaced. 2 months later, the battery started draining. I had the alternator replaced and the battery twice. Car will work for a day or two and dies again. So many other mercedes owners of C320 are having the same problem. Battery dying and car stalling.”
NHTSA complaint #10279868, filed 2009-08, 74,500 miles“On 1/14/2012 car wont start battery dead, call aaa tow truck. Jump battery ok used cared next day and on faul come up on my cars troulbe screen to indicated that I had any other trouble in any system it the car, we when to fl on the on the 16 of january car was home (in ny) son was going to take of house and start car once a week. Received phone call from my son on 1/17/2012 car wont start,battery dead, and key wont turn. …”
NHTSA complaint #10456749, filed 2012-04, 40,000 miles - Electronic stability control
ESP/BAS warnings, loss of power or speedometer
- 9 complaints (13%)
- median 82,200 mi at 9.1 yrs old (7 state mileage, few)
- 1 mention a crash, fire or injury
- filed 2002–2015
Complaints describe the ESP, BAS and ABS warning lights coming on while driving, sometimes with the speedometer dropping to zero, the engine dropping to idle with no accelerator response, or the car refusing to shift out of park. Owners report restarting the car clears it temporarily, and that dealers were not always certain a replacement part would resolve it. A few mention a burning smell or smoke with the warning light. Reported from low mileage up to around 125,000 miles, sometimes on long drives or mountain descents.
What to check: During a test drive, watch for ESP/BAS/ABS lights and confirm the speedometer reads steadily. Ask whether any related control unit or sensor has been replaced and if related fault codes are stored.
2 excerpts from owner complaints in NHTSA records
“I own a mercedes benz C320 and lately I've been experiencing some problems, few weeks ago, my car wouldn't start all of a sudden. I jump started and I noticed 2 faults .. …”
NHTSA complaint #10217517, filed 2008-02, 82,200 miles“Driving from san francisco (sea level) and eventually descending from echo pass at 7200 feet elev to lake tahoe (6200 feet elev) on hiway 50, all of a sudden, the vehicle display showed an esp warning light while simultaneously the engine went into 'idle' mode (engine was still running) and the accelerator pedal could summon no power. Pulled over and turned car off completely to ponder. Turned car back on and the esp warning light was gone. There was full accelerator power again. …”
NHTSA complaint #10538119, filed 2013-08, 135,000 miles - Exterior lighting
Lights and wiring faults (bulbs, connectors, harness)
- 7 complaints (10%)
- median 62,500 mi at 5.4 yrs old (6 state mileage, few)
- 1 mention a crash, fire or injury
- filed 2003–2023
Owners describe bulbs going out repeatedly, headlamps and turn signals working intermittently, and dashboard warnings for lights that are actually on. Some report the dealer cleaning or replacing connectors and reprogramming control units without a lasting fix. A few complaints describe brittle or deteriorated wiring insulation found when changing a bulb. Mostly reported between about 30,000 and 100,000 miles, with some at higher mileage.
What to check: Check that all exterior lamps, turn signals and the instrument cluster work, and look at the wiring and connectors in the headlamp housings for cracked insulation or corrosion. Service bulletins note that some lamp fogging is normal and does not affect function.
2 excerpts from owner complaints in NHTSA records
“The light bulbs in my 2002 mercedes C320 are repeatedly going out. In the last year I have replaced (or had the dealer replace) the trunk light twice, the license plate light twice, both brake lights in the back at least once. In the last 3 months, we've replaced the front left turn signal light 3 times. The dealer cleaned the connectors last week - says that mercedes knows of a faulty electrical connector problem and an exec at mercedes was fired over the bad contractor they used. Currently the front left turn signal works sporadically. …”
NHTSA complaint #10161872, filed 2006-07, 50,000 miles“Intermittently the left headlight failed to function. When this occurred the lights illumination was reduced. Sometimes there was a warning on the dashboard that indicated the light was out, even if the light was on. Vehicle was serviced by the dealership 5 times hey reprogrammed the computer, changed the headlight connection, and altered the light bulb. Tbut failure recurred.”
NHTSA complaint #10087246, filed 2004-08, 32,000 miles - Transmission and drivetrain
Transmission not shifting or clunking
Mentioned in 4 of 60 sampled complaints
Complaints describe the automatic transmission going into neutral while in drive, locking in a gear, or not shifting properly, and one describes harsh engagement when moving between P, D and R. A separate clunk on throttle lift-off when changing direction is covered by service bulletins. Owners report dealer visits with mixed results. Reported from around 36,000 miles up to higher mileage, often during highway driving or gear changes.
What to check: Test the transmission cold and warm through all gears, including a stop-to-reverse change, and listen for a single clunk from the side shaft. Ask whether transmission fluid and any software updates were done.
2 excerpts from owner complaints in NHTSA records
“I leased a 2002 mercedes c32 in december of 2002. Its a documented fact mercedes has been experiencing a high number of defect complaints with this model car. Recently for me was the most serious.. On december 26th 2004, while merging onto a major highway(i95) my car's automatic transmission went into neutral while in the drive position. I had to pull over on the side of the highway put the car into park then back to drive to resolve the problem. I notified mercedes on 12/27, at an appointment I had previously scheduled for other problems. …”
NHTSA complaint #10115959, filed 2005-03, 36,000 miles“I have experienced the same exact problems with transmission not shifting properly as well the power seat module draining the battery with numerous jump starts. This occurred just two weeks after gladly purchasing my five point certified 2002 C320 wagon. Mercedes benz of greensboro also would not fix chipping on the front bumper. States because the vehicle is low profile the bumper sustained this extensive peeling as a result. Peeling is located from left to right top to bottom. …”
NHTSA complaint #10269559, filed 2009-05
Buying note. Check the battery drain history carefully, since it is the most common complaint and repairs are not always permanent, and budget for lighting and electrical work on a car of this age. Have a pre-purchase inspection scan for stored ESP, transmission and EVAP codes, and confirm the sunroof recall work has been completed.
Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.
NHTSA recorded 68 consumer complaints for the 2002 Mercedes-Benz C320. 42 of the complaints include a mileage, and 31% of those were filed for vehicles with under 50,000 miles; the median is 70,000 miles. Of all complaints, 3 involved a crash, 3 a fire, 4 an injury, 1 a death, according to the filers. NHTSA lists 3 recall campaigns and 48 technical service bulletins for this model year.
Not compared (before 2008). Model years 2008–2023 of the same vehicle that have at least 25 complaints are compared, and a model needs at least 3 of them.
Which parts are reported most
Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.
- Electrical system36 53%
- Seats23 34%
- Exterior lighting5 7.3%
- Air bags4 5.9%
- Brakes3 4.4%
- Other or unknown3 4.4%
- Engine cooling2 2.9%
- Fuel system2 2.9%
Also reported: Latches, locks and linkages (2), Steering (2), Body and structure (2), Visibility (wipers, defrost, mirrors) (2), Engine (1), Equipment (1), Suspension (1), Vehicle speed control (1).
Example complaints
Electrical system: “There have been two warning lights for rear lights and after driving for 4 hours, a warning came on for electrical stability and my car quit working completely. There was a burning smell and I had to restart it. I am very concerned about this.”
NHTSA complaint #10525598, filed 2013-07, 68,000 milesSeats: “I came out and my battery was dead without warning. I took the vehicle to downtown la motors(mercedes benz) dealer, where they explained that the seat control modules were staying on and causing the battery to drain. I subsequently had to unhook the seat controls and now I am unable to move my seats or steering wheel. They estimated that the repair would cost around 1500. Numerous customers have the same issue on the same vehicle, it is obvious that this is a manufacturer defect and not the fault of mercedes benz consumers.”
NHTSA complaint #10466021, filed 2012-07, 50,000 milesElectronic stability control: “Was driving on highway when esp, bas and ABS lights show up, and speedometer display stops working - speed reading goes to zero, though there is no reduction in speed. Get to destination. On return it happens again. This time I go to rest area, stop the car, remove the key and restart. The car refuses to move out of park. Call roadside assistance and get instruction to override park, drive home with flashers on - very rough ride quality. Tow to dealer next day, they are not sure if new part will fix it, even if $1850 part is replaced. Lots of electrical problems over the years. …”
NHTSA complaint #10747123, filed 2015-08, 125,000 milesExterior lighting: “Mercedes benz 2002, C320 *steering wheel malfunction warning *seats malfunction *brake and oil fluid misleading info *battery drain *turning signals requiring new harness that cost a lot $$$.”
NHTSA complaint #10297061, filed 2009-12, 92,887 milesMileage when problems were reported
31% of the 42 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 45,000 and 89,000 miles.
Complaints by year filed
Trend: rising. Complaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
Fuel economy and running cost
EPA ratings for each 2002 Mercedes-Benz C320 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).
| Version | Engine | Transmission | City | Hwy | Comb. | Fuel / yr |
|---|---|---|---|---|---|---|
| C320 RWD | 3.2L 6-cyl | 5-speed automatic | 17 | 23 | 19 | $4,350 |
| C320 (Wagon) RWD | 3.2L 6-cyl | 5-speed automatic | 17 | 23 | 19 | $4,350 |
Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.
Recalls and investigations
- 24V874000Nov 19, 2024Visibility › Sun/moon roof assemblyCovers: Mercedes-Benz C320 2001–2005, E320 2003–2009, C230 2002–2007 +20 more
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.
- 22V954000Dec 23, 2022Visibility › Sun/moon roof assemblyCovers: Mercedes-Benz C320 2001–2005, C230 2002–2007, CLS550 2006–2011 +18 more
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.
- 19V918000Dec 20, 2019Visibility › Sun/moon roof assemblyCovers: Mercedes-Benz C320 2001–2005, E320 2003–2009, C230 2003–2007 +21 more
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…
Recall details for the 2002 Mercedes-Benz C320 → · Check a VIN at nhtsa.gov/recalls
Technical service bulletins
TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 48 on record; the latest 10 are shown.
- 11038186Sep 22, 2026Brakes. Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is…
- 11038217Sep 14, 2026Body and structure. Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even…
- 11036101Aug 6, 2026Body and structure. Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even…
- 11035005Jul 14, 2026Transmission and drivetrain. Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. Note: Sound…
- 11032875May 19, 2026Visibility (wipers, defrost, mirrors). Complaint There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper blades squeaking, chattering, shuddering B: The windshield is not wiped completely…
- 11031580Apr 16, 2026Exterior lighting. Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical…
- 11029959Mar 9, 2026Exterior lighting. Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical…
- 11029025Feb 24, 2026Exterior lighting. Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical…
- 11025648Nov 15, 2025Transmission and drivetrain. Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa)…
- 11019018May 21, 2025Transmission and drivetrain. Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa)…
Other model years of the Mercedes-Benz C320
| Year | Complaints | Median mi | Recalls | Crash ★ | MPG | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|---|
| 2005 | 15 | 96,234 | 4 | — | 19 | — | Falling |
| 2004 | 15 | 64,500 | 3 | — | 20 | — | Falling |
| 2003 | 22 | 54,352 | 3 | — | 19 | — | Rising |
| 2002 | 68 | 70,000 | 3 | — | 19 | Not compared (before 2008) | Rising |
| 2001 | 63 | 70,000 | 3 | — | 19 | Not compared (before 2008) | Falling |
All Mercedes-Benz C320 model years
Frequently asked questions
What are the most common problems with the 2002 Mercedes-Benz C320?
Owners of this model year most often report a battery that goes flat while the car sits, usually traced by dealers or shops to the seat control modules staying powered up. The issues reported most often: Battery drains while parked (seat control modules); ESP/BAS warnings, loss of power or speedometer; Lights and wiring faults (bulbs, connectors, harness).
How many NHTSA complaints does the 2002 Mercedes-Benz C320 have?
NHTSA recorded 68 consumer complaints for the 2002 Mercedes-Benz C320 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
What part of the 2002 Mercedes-Benz C320 is reported most often?
Electrical system is named most often, in 36 complaints (53% of the total), followed by seats with 23.
Has the 2002 Mercedes-Benz C320 been recalled?
NHTSA lists 3 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.
What gas mileage does the 2002 Mercedes-Benz C320 get?
The EPA rates the 2002 Mercedes-Benz C320 (C320, 3.2L 6-cyl) at 19 mpg combined, 17 city and 23 highway, with an estimated annual fuel cost of $4,350 at 15,000 miles a year. Other engine and drive versions are rated differently.
At what mileage are problems with the 2002 Mercedes-Benz C320 reported?
Among the 42 complaints that include a mileage, the median is 70,000 miles and the middle half falls between 45,000 and 89,000 miles; 31% were filed for vehicles with under 50,000 miles.
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).
Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.