| 1 | 0 | 3 | 4 | 3 | 4 |
2003 Mercedes-Benz C-Class repairs by problem area
Engine (44%)
Transmission and Drivetrain (7%)
Brakes and Traction Control (4%)
Suspension and Steering (11%)
Electrical and Air Conditioning (22%)
Paint, Rust, Leaks, Rattles, and Trim (9%)
Other (3%)
Chart based on 147 repairs.
2003 Mercedes-Benz C-Class engine repair cost distribution
$2500+ (3%)
$1000 - $2499 (24%)
$500 - $999 (12%)
$100 - $499 (24%)
< $100 (36%)
Chart based on 58 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2003 Mercedes-Benz C-Class
Engine not specified
| 125000 mi | Too many things wrong. Most recently an engine coolant leak. Probably going into the cylinders, so maybe a head gasket leak. |
| 82000 mi | Engine idle and drive fluctuating. |
2003 Mercedes-Benz C-Class 4dr Wagon
215-horsepower 3.2L V6 6-speed manual RWD
| 64480 mi C $350 |
Replace o2 sensor |
| 66960 mi | Check Engine light - result was new Catalytic Converter installed. Parts and labour covered by Mercedes at 65,000 miles. (108,000 kilometers ) Guarantee is for 8 years and or 80,000 miles. |
| 71300 mi C $1100 |
Rough idle when cold and minor roughness felt through steering a certain speeds. Engine mounts replaced. Car is running well again. |
| 78120 mi C $2000 |
A small module that helps to start the car. |
| 80180 mi C $395 |
Cable to spark plug number four not working. |
| 81320 mi C $1485 |
Worst rainstorm in Toronto last week since Hurricane Hazel in 1954. Rain got into the ECU (engine computer)and the car wouldn't start. $400 diag from dealer, but they wanted $4746 for the repair. Got reconditioned ECU for $775 + $160 for overnight. |
2003 Mercedes-Benz C-Class 4dr Wagon
168-horsepower 2.6L V6 5-speed shiftable automatic AWD
| 18322 mi | Control Module |
2003 Mercedes-Benz C-Class 4dr Sedan
supercharged 349hp 3.2L V6 5-speed shiftable automatic RWD
| 62000 mi | Supercharger bearing was bad. Replaced belt at the same time. |
| 84000 mi US $200 |
Replaced all radiator hoses and intercooler pump. |
| 249000 mi | Blew my timing chain and destroyed engine. To expensive to fix and not worth fixing at this point. Will probably donate or sell the car for parts. |
2003 Mercedes-Benz C-Class 4dr Sedan
supercharged 189hp 1.8L I4 5-speed shiftable automatic RWD
| 44000 mi US $85 |
Car lost power,stuck in high gear(automatic),then CEL came on.Car was serviced by dealer since new,wanted more $ to just take a look than I'm willing to pay. Found dirty air filter myself(looked never replaced),replaced & clean AMS, fixed! |
| 49300 mi US $1500 |
one of the hoses or pipes was cracked & caused the check engine light to turn on. |
| 39460 mi | two small vacuum pipes running under engine plastic cover. The pipes had cracks due to age and heat |
| 73780 mi | Replaced camshaft magnets to prevent oil leaks |
| 23560 mi | Accelerator pedal not working properly - not responding to kick-down acceleration. Parts replaced under warranty. |
| 26040 mi | Accelerator pedal not working properly, again not responding to kick-down acceleration. Problem localized to fuel injectors, which requires major engine work. Service appointment booked. |
| 26660 mi | Engine repair (under warranty) for fuel injectors not working properly. |
| 61687 mi US $177 |
apparently there was an oil leak |
| 68306 mi US $2186 |
Cylinder 3 would misfire randomly(mostly during idle) and cause engine to convulse. work around was to increase idle rpm to >1k. |
| 90751 mi US $34 |
Oil leaking from the top of the engine most likely from the oil cap. Gasket replaced. |
| 92656 mi US $79 |
Secondary O2 air sensor failure. Replaced sensor. |
| 136672 mi US $1235 |
Fuel pump failure. replaced fuel pump |
2003 Mercedes-Benz C-Class 4dr Sedan
215-horsepower 3.2L V6 5-speed shiftable automatic RWD
| 54000 mi US $125 |
Replaced crankshaft position sensor after car stalled. |
| 81000 mi US $470 |
Replace water pump. |
| 83900 mi | Replaced main radiator hose that is leaking. |
2003 Mercedes-Benz C-Class 4dr Sedan
215-horsepower 3.2L V6 5-speed shiftable automatic AWD
| 55000 mi US $400 |
One bad coil pack was replaced and all spark plug wires were replaced. |
2003 Mercedes-Benz C-Class 4dr Sedan
168-horsepower 2.6L V6 5-speed shiftable automatic RWD
| 118000 mi US $359 |
replaced a catalytic converter (rebuilt) |
| 141500 mi US $275 |
car starts after several times try..check engine light on; diagnostic function test; faulty crankshaft position sensor. replace with new. |
| 74000 mi | Slight vibration - motor and transmission mounts replaced. |
| 85300 mi US $450 |
Left catalytic converter |
| 99000 mi | Crankshaft Position sensor replacement |
2003 Mercedes-Benz C-Class 4dr Sedan
168-horsepower 2.6L V6 5-speed shiftable automatic AWD
| 156000 mi US $380 |
Crankshaft alignment sensor was replaced by Midas ($380.00) because the dealership wanted $950.00 to do the same thing. |
| 109000 mi | Shop damaged sensor while repairing starter. Reset code, but it returned. Shop replaced for no charge. Works as intended now. |
2003 Mercedes-Benz C-Class 4-door
turbocharged 5-cylinder diesel automatic 2WD
| 166160 mi €180 |
broken gasoline line (from filter to pump) |
2003 Mercedes-Benz C-Class 2dr Hatch
supercharged 189hp 1.8L I4 6-speed manual RWD
| 63000 mi US $150 |
Check engine light. Downstream O2 sensor. |
| 65000 mi US $500 |
Check engine light. Upstream O2 sensor. |
| 81000 mi US $1600 |
cracked oil filter cap |
| 107880 mi C $326 |
Oxygen Sensor replaced, upstream sensor. |
| 117800 mi C $1050 |
Bolts and flange repaired |
| 125240 mi C $55 |
Check Engine light, code turned off Check engine light reappeared, replaced downstream O2 sensor, turned light off, additional cost $277 |
| 132260 mi C $660 |
Check Engine light on, this is multiple times for this issue, seems difficult to diagnose. |
| 133300 mi C $49 |
Another Check Engine light, light reset, seems to be air related, or fuel EVAP, Very frustrating. |
| 133300 mi C $465 |
Check engine light, to do with threshold being reached one time on oxygen sensor |
| 118000 mi US $2000 |
Timing chain stretched and intake cam adjuster failed. |
| 118000 mi US $3000 |
Timing chain stretched and skipped causing valve damage. The head, timing chain, timing chain tensioner and the one of the guide rails was replaced along with one of the cam adjuster magnets. Also replaced coolant pipes (since in there) and vacuum lines (had failed). |
| 120700 mi US $40 |
Upstream Oxygen sensor went bad. CEL and pulled codes. |
| 152000 mi US $45 |
Replaced coolant reservoir and cap. They were both showing signs of starting to fail. The edges of the reservoir were starting to show signs of the plastic checking and drying out and the system was losing pressure. It wasn’t actually leaking yet, but, the cap was releasing steam prematurely and the coolant level was dropping (although there weren’t any visible drips or puddles under car). |
| 93620 mi C $800 |
Check engine light coming on due to thermostat. |
| 53940 mi C $960 |
Cracked intake box after the MAF. Still don't know how it happened, was throwing the computer into fits. Over work the O2 sensors - so they failed. the box had to come from germany hence the long down time. |
2003 Mercedes-Benz C-Class 2dr Hatch
supercharged 189hp 1.8L I4 5-speed shiftable automatic RWD
| 88040 mi C $2000 |
Went in for an oil service, turned out there was a leak at the cam cover where oil got into the wiring harness damaged (though still working) some of the emissions equipment (EGR solenoid). |
| 103540 mi C $600 |
sensor malfunction. Wrong trouble code. Dealer resolved. |
| 111600 mi C $1800 |
Check engine light came on. Replace oxygen sensor, EGR valve, control module. |
| 104160 mi C $1200 |
Replaced EGR valve, EGR control module. Is feeling ripped off as car was in for full service inspection 2 months ago at $1100.00 Replaced O2 sensor. |
| 137600 mi C $1200 |
I am annoyed that CEL came on and an O2 sensor needed to be replaced 2 weeks after I spent $1800 for a full service at MB. MB charged to redo everything they did 2 weeks ago. |
| 122500 mi US $900 |
Belt tensioner failing. Replaced unit and belt |
| 162500 mi US $600 |
Check engine light. Discovered a cracked hose under intake manifold. |
| 53940 mi C $3700 |
Cam shaft seal leak caused oil to enter the electrical system compromizing the ECU, MAF, O2 sensors & wiring harness... recall in the USA but not recognized in Canada. mercedes Canada covered 50% of parts no labor. Coolant line leaking into the transmission, another known problem by mercedes yet no Canadian recall. radiator was repaired and transmission was tripple flushed, Transmission will now soon have to be replaced 1,2 clutch (auto) is toast. |
2003 Mercedes-Benz C-Class 2dr Hatch
215-horsepower 3.2L V6 5-speed shiftable automatic RWD
| 82000 mi | Oil was leaking from under engine....was told a seal had broken...the dealer repaired it...leaked the next day.....repaired it again..has not leaked since-- |
2003 Mercedes-Benz C-Class 2dr Hatch
| 78000 mi US $2000 |
Small fuel leak, could smell in the cabin |
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