2005 Mercedes-Benz C-Class Mercedes-Benz C-Class 2005

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2005 Mercedes-Benz C-Class repairs by problem area

Engine (41%)

Transmission and Drivetrain (7%)

Brakes and Traction Control (3%)

Suspension and Steering (9%)

Electrical and Air Conditioning (24%)

Paint, Rust, Leaks, Rattles, and Trim (8%)

Other (8%)

Chart based on 185 repairs.
See TSBs and recalls for the 2005 Mercedes-Benz C-Class.

2005 Mercedes-Benz C-Class engine repair cost distribution

$2500+ (6%)

$1000 - $2499 (6%)

$500 - $999 (18%)

$100 - $499 (28%)

< $100 (42%)

Worried about potential repair costs? An extended warranty can provide peace of mind.

Chart based on 65 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2005 Mercedes-Benz C-Class

Engine not specified

104000 mi

US $175
EGR value went bad 

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2005 Mercedes-Benz C-Class 4dr Wagon

168-horsepower 2.6L V6 5-speed shiftable automatic AWD

50840 mi water disappeared from radiator...faulty pump, improperly diagnosed on previous visit to dealership 

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2005 Mercedes-Benz C-Class 4dr Sedan

supercharged 189hp 1.8L I4 6-speed manual RWD

42000 mi

US $75
Fuel pumps were replaced, out of pocket cost $75, total repair bill $1500. 

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2005 Mercedes-Benz C-Class 4dr Sedan

supercharged 189hp 1.8L I4 5-speed shiftable automatic RWD

31000 mi CEL on. Traced to leak in fuel filler neck. Replaced under warranty. 
36000 mi Transmission connector leaking. Replaced. Transmission mount collapsed. Replaced. Warranty ends. 
101000 mi

US $430
Thermostat failure.. replacement part was $28 and labor was $100. The rest was other maintenance.  Thermostat failure.. replacement part was $28 and labor was $100. The rest was other maintenance.  
130000 mi

US $300
Engine mounts replaced 
54900 mi

US $20
Replaced thermostat 
115300 mi

US $170
transmission mount bad R&R part $70, labor $100 
137000 mi

US $235
miss in engine when starting. adj. mass air. 
85000 mi

US $100
Replace camshaft magnets as they were leaking oil. 
92000 mi

US $100
The alternator one way pulley was frozen. I replaced it. 
24000 mi Roaring noise coming from rear of car while accelerating. Dealer initially unable to replicate, later through thorough vibration sensor exam found that the rear transmission mount had broken. 
3500 mi engine seal leaking 
113000 mi

US $50
Oil leaking, replaced valve cover gasket. 
113998 mi

US $150
Oil vac pump 
123000 mi

US $80
Cam magnet sensors replacement. They were leaking oil. 
75000 mi

US $878
Oil leak from Vacuum Booster, replaced. Tranny oil leak from sensor, sensor replaced. 
88000 mi Cam sensor replaced under recall. minor seeping of oil was noted. 
51000 mi Thermostat was stuck open 
57000 mi Vacuum pump seal leaking oil on engine right side 
64000 mi Check engine light and poor performance initiated visit. Service Campaign indicated that solenoid oil leaks were cause. Completed service campaign and replaced parts and car is good. Unrelated but had to replace battery this month. 
57000 mi

US $555
needed hose for intake hose cost 28.00 but removal of trottle body etc to replace hose labor cost was $500.00 
75000 mi Check engine light, loss of fuel pressure. Couldn't find leak, reset light. 
85000 mi

US $1000
Check engine light, loss of fuel pressure. Leak in fuel filler neck, needed to smoke test and replace neck and seals. 
57000 mi

US $150
Cam magnet sensor leaking. 
84000 mi

US $100
Thermostat 
95000 mi

US $300
Cooling system thermostat. Magnetic Camshaft Sensors leaking oil. 
67000 mi M-B dealer replaced the transmission control module. Persistent reports of sluggish shifting on the SSk variant apparently prompted this. Appears to be the subject of a TSB or "for cause" event. Replaced at no charge to us, while in for an oil change. 
158000 mi

US $2500
camshaft sprocket failed. 
61000 mi Vacuum hose bulletin, with some seals. 
79000 mi

US $2009
Cel on for thermostat.  Vacuum leak. Fuel filter replaced. Spark plugs. Battery. Alignment. Wipper blades. Service B. 
48000 mi Bad temp sensor - replaced. 
46000 mi The check engine light came on, I took the car to the dealer. They told me it was a loose gasket, but that a recall had been ordered on it, so they were going to order the part and repair it when the part arrived. She is scheduled to go back in the 30th 
79600 mi

US $2000
Vapor leak at gas tank neck repaired. Oil leak repaired. 
86000 mi

US $600
Alternator pulley causing tensioner to vibrate; replace pulley and vbelt. 
32736 mi combustion chamber event (service campaign) direction thrust arm replacement (warranty) 
40300 mi  

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2005 Mercedes-Benz C-Class 4dr Sedan

supercharged 154hp 1.8L I4 5-speed shiftable automatic RWD

77820 mi

$50
The M271 engine has problems with carbon buildup in the valves for two reasons: 3-hole injectors and engine oil vapors. At the moment I 'm trying to burn the carbon with a fluid added to the intake. 
86800 mi

$400
change radiator 

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2005 Mercedes-Benz C-Class 4dr Sedan

362-horsepower 5.4L V8 5-speed shiftable automatic RWD

55000 mi same problem after driving it for 1 day 
123360 mi

R 1000
Engine & Transmission mounting changed,  
130180 mi

R 700
Water Pump change 
106000 mi

US $550
emissions air injection pump went out 
106000 mi Replacement air injection pump for emissions control failed after a month, replaced again. 
90000 mi

US $2800
Replaced crank sensor Repaired several oil leaks 
94500 mi

US $780
Replaced Mass Airflow Sensor 
86832 mi

US $160
Engine wouldn't turn over and oil was about 2 quarts low. Filled up oil until oil level OK and drove to shop. A new crank position sensor was needed. Repair was two hours labor. 

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2005 Mercedes-Benz C-Class 4dr Sedan

215-horsepower 3.2L V6 5-speed shiftable automatic AWD

93000 mi

R 4700
Oxygen sensors. 
140520 mi

R 10000
Fan Broke 

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2005 Mercedes-Benz C-Class 4dr Sedan

168-horsepower 2.6L V6 5-speed shiftable automatic AWD

125000 mi

US $436
Crank sensor replaced, and valve cover gasket replaced 
147137 mi

US $298
Camshaft position sensor replaced 
169508 mi

US $817
REPLACED BOTH VALVE COVER GASKETS Smelled oil - Replaced both valve cover gaskets 
174300 mi

US $733
Replaced all three engine mounts. Straightened a rim Engine felt rough, Motor Mounts needed replacing. New MB OEM Motor Mounts installed 
174937 mi

US $538
Water Pump replacement Water pump replacement 
185200 mi

US $259
replace oxygen sensor Engine light came back on after a few days. Replace EGR Valve, cleaned EGR tubes 
185300 mi

US $603
New valve cover gaskets 
222209 mi

US $455
Transfer case service twice flushed with new fluid, transmission mount, oil change 

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2005 Mercedes-Benz C-Class 4-door

4-cylinder manual 2WD

41540 mi

$300
car is sometimes using only 3 cylinders out of 4 

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2005 Mercedes-Benz C-Class 2dr Hatch

supercharged 189hp 1.8L I4 6-speed manual RWD

57350 mi

C $55
Added Adapter cables MB #2711502733 to camshaft sensor cables to prevent oil leaking into the wiring harness. Added Adapter cables MB #2711502733 to camshaft sensor cables to prevent oil leaking into the wiring harness. 
71500 mi

C $50
Replace thermostat and upper radiator hose. 
82460 mi

C $40
Check engine light came on. A rodent had chewed the paper pleats in the engine air filter. Vacuumed all the loose filter material. Used the metal mesh part of a furnace air filter and duct tape to fashion a screen over the air intake. Engine light cleared itself. Replaced the engine air filter. 
21000 mi CEL light came on, diagnostic was coolant thermostat needed replacement. Part ordered from Germany, arrived a week later, car now fixed (1+1 days total) Installed new thermostat. 

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2005 Mercedes-Benz C-Class Engine Problems

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently 2005 Mercedes-Benz C-Class problems occur, check out our car reliability stats.