2009 Mercedes-Benz C-Class Mercedes-Benz C-Class 2009

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2009 Mercedes-Benz C-Class repairs by problem area

Engine (19%)

Transmission and Drivetrain (5%)

Brakes and Traction Control (5%)

Suspension and Steering (6%)

Electrical and Air Conditioning (43%)

Paint, Rust, Leaks, Rattles, and Trim (11%)

Other (10%)

Chart based on 171 repairs.
See TSBs and recalls for the 2009 Mercedes-Benz C-Class.

2009 Mercedes-Benz C-Class engine repair cost distribution

$2500+ (4%)

$1000 - $2499 (26%)

$500 - $999 (7%)

$100 - $499 (30%)

< $100 (33%)

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

Chart based on 27 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2009 Mercedes-Benz C-Class 4dr Sedan

turbocharged 221hp 3.0L V6 Diesel 7-speed shiftable automatic AWD

16120 mi Faulty glow plug. 
60140 mi

£200
Replaced 3 faulty glow plugs 

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2009 Mercedes-Benz C-Class 4dr Sedan

turbocharged 201hp 2.1L I4 Diesel 6-speed manual RWD

5952 mi Injectors (Delphi) failed. Mercedes will make a recall of this kind of injector installed in all the C220 and C250 Blue Efficiency models as soon as Delphi can produce them Injectors failed, under warranty, but Mercedes doesn't have enough injectors to fulfill all those c220 and c250 that are breaking down. I expect to have my car in 2 or 3 weeks. This is really sad...so much tests, and about40%of the Delphi injectors 
63540 mi

€120
A transmission rubber support which was changed last year had to be changed again Rubber support of the engine was damaged and was replaced 
65100 mi

€95
Burn oil smell came from the engine. It was a faulty o-ring in one injector. 
79980 mi

€500
Water pump leaking 
80080 mi

€450
Lambda sensor failed 

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2009 Mercedes-Benz C-Class 4dr Sedan

supercharged 181hp 1.8L I4 5-speed shiftable automatic RWD

44640 mi

$450
Motor and transmission mounts required replacement. 
45360 mi

$1200
Check engine light illuminated, engine occasionally stalled after starting. When running, no obvious driveability issues except possible decreased power output. 

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2009 Mercedes-Benz C-Class 4dr Sedan

268-horsepower 3.5L V6 7-speed shiftable automatic RWD

120000 mi

US $1600
2x Motor Mounts & 1x Transmission Mount 
81000 mi

US $175
Oil leaking from engine oil vents 
67780 mi

$1600
Engine intake manifold. One of the rods broken but the only to repair is to replace the whole manifold. Bad design from Mercedes Benz. 
83680 mi

$200
Cold air intake tubes cracked due to wear and tear. 

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2009 Mercedes-Benz C-Class 4dr Sedan

268-horsepower 3.5L V6 7-speed shiftable automatic AWD

9920 mi Lag in shifting between Drive and Reverse in transmission. Dealer noted "no problem detected", and advised that latest software was already installed. Dealer performed a reset/relearn on the transmission. 

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2009 Mercedes-Benz C-Class 4dr Sedan

228-horsepower 3.0L V6 7-speed shiftable automatic RWD

9000 mi When the car is cold (first driven during the day and when it's cold outside), a minute after it's started and for about 2 minutes a squeak(1 sec separating) comes from what sounds like a belt pulley. It did this last winter too.  
27000 mi Cold-start metallic squeaking sound, present since new, was traced to a defective belt pulley. Pulley and also belt replaced under warranty; haven't noted problem since. 
68000 mi

US $2200
Collapsed transmission mount and all engine mounts (leaking) replaced. Replaced serpentine belt and pulley. 
189000 mi

US $2300
Oil leaks 
220000 mi

US $94
ECM determined to be bad. Got it repaired at a computer shop. Still does not work. Engine light on. Have not driven since 

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2009 Mercedes-Benz C-Class 4dr Sedan

228-horsepower 3.0L V6 7-speed shiftable automatic AWD

8000 mi the fuel cap indicator was on, and wouldn't go off after a couple of re-fueling efforts (and of course, after tightening the cap). apparently there was no problem after they ran it through their system and did the same thing. 
12000 mi

US $300
When I bought this car, the infamous salesman at the Oakland dealership assured me it was a flex-fuel car. Now, in Minnesota where getting E85 is so easy, we tried to find engine light on. I am now told not all C300 are E85 ready. 
60000 mi

US $2000
Oil leaks in two places: oil leaks have been found, one from the engine and one from the transfer case. I was told that it's typically found on all wheel drive vehicles (for Mercedes I assumed). 
26000 mi Cam plugs leaking and were replaced. 
49000 mi

US $800
Engine mounts collapsed. Transmission mounts replaced at same time to save future labor cost. 204-240-15-17 204-240-06-18 Rear cylinder head oil centrifuge leaking. 272-010-06-31 Replaced. 
139000 mi

US $450
thermosat stuck open 
242000 mi

US $1500
Motor mounts (2), and Transmission mount (1) 

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2009 Mercedes-Benz C-Class 4dr Sedan

228-horsepower 3.0L V6 6-speed manual RWD

179000 mi

US $4000
Flap regulating flow of air to intake manifold broke 

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See TrueDelta's information for all Mercedes-Benz models.

2009 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 2009 Mercedes-Benz C-Class problems occur, check out our car reliability stats.