

Engine (30%)
Transmission and Drivetrain (7%)
Brakes and Traction Control (4%)
Suspension and Steering (10%)
Electrical and Air Conditioning (31%)
Paint, Rust, Leaks, Rattles, and Trim (12%)
Other (6%)
$2500+ (7%)
$1000 - $2499 (14%)
$500 - $999 (10%)
$100 - $499 (15%)
< $100 (54%)
turbocharged 503hp 4.0L V8 7-speed shiftable automatic RWD
13000 mi | Warning light indicated failure of limited slip differential. Dealer reset with new software and indicated the matter was a "bad sender". |
turbocharged 362hp 3.0L V6 7-speed shiftable automatic AWD
9000 mi | Oil leak with transaxle |
9300 mi | Jerking when starting from a stop. Dealer updated transmission software. |
27000 mi | Transmission shifted poorly in low gears |
turbocharged 241hp 2.0L I4 7-speed shiftable automatic AWD
7440 mi | Periodic rough shifting between 2nd and 3rd and sometimes 3rd to 4th. Couldn't be reproduced by technicians. |
9080 mi | Rough shifting from 2nd to 3rd and sometimes 3rd to 4th. Tested with sr tech. Noted it is a bit rough. Updated transmission software. Much better since software update. |
turbocharged 241hp 2.0L I4 7-speed shiftable automatic AWD
18500 mi | Transmission very jerky between 2-4th gear randomly. Still waiting on a fix. At the shop for the 3rd time for the problem. Intermittent, could not replicate. |
248-horsepower 3.5L V6 7-speed shiftable automatic AWD
27000 mi US $500 |
Howling sound would appear only when cold and between 25-35mph. I told advisor it was a bearing noise coming from the center of the car, and it took them about three weeks to find the cause - a Center Bearing. Fix was under warranty. |
248-horsepower 3.5L V6 7-speed shiftable automatic AWD
23000 mi | Jerky downshifts at 15mph. |
turbocharged 201hp 1.8L I4 7-speed shiftable automatic RWD
7200 mi | Check Engine light stays on and car would not go above 40 mph. I was so disappointed for Mercedes Benz brand. Car only has 7200 miles. Will post you update after the trip to dealer. |
228-horsepower 3.0L V6 7-speed shiftable automatic AWD
16200 mi | Rear transmission seals leaking |
18100 mi | Rear differential seals leaking |
21300 mi | Rear differential leak. This will be the third time the car has Ben in for this issue |
35000 mi | clunk when you put the car in reverse or turn wheel tight. |
turbocharged 4-cylinder diesel automatic AWD
12060 mi | Rough gearshifts between 2-3. |
13640 mi | Rough gearshifts between 2-3. |
19840 mi | Rough shifting between 2nd and 3rd gear. |
268-horsepower 3.5L V6 7-speed shiftable automatic AWD
9400 mi | Transmission seal leaking |
228-horsepower 3.0L V6 7-speed shiftable automatic RWD
58000 mi | The differential developed a small leak. It was fixed at no cost to me. |
228-horsepower 3.0L V6 7-speed shiftable automatic RWD
137000 mi US $3000 |
Transmission Mount. When car would shift gears I could feel some jerk. Once replaced it was very smooth. |
44000 mi US $250 |
43412 150 PERFORM SHORT TEST FOUND NO CODE CK TRAN FLUID LEVEL GOOD CK FOR ANY NEW SOFTWARE HAS ONE PERFORM TRAN SOFTWARE UPDATE |
44000 mi | The transmission jerks/bucks in lower gears while shifting from 2nd to 3rd gear. Dealership wouldn't fix it until it got worse. I took the car in five times. With warranty expiring next year I sold the car. |
228-horsepower 3.0L V6 7-speed shiftable automatic AWD
41000 mi US $259 |
Required transmission service at 40K miles. Tech noted leaking transfer case for AWD system need repair under warranty. |
67000 mi | Bearing in transmission failed. Cost of repair was $6800.00, so traded as is, for a 2016 Volvo XC70. |
51000 mi | Leak from transfer case. Had to disassemble transmission to replace gasket. |
10540 mi | Oil leaking from transfer case |
31620 mi | transmission bumped when changing down under load, after slowing down going up a hill. |
turbocharged 201hp 2.1L I4 Diesel 5-speed shiftable automatic RWD
61000 mi | Noticed a transmission whine while on a long vacation trip. Mostly occurred at around 65-75 mph (European roads allow up to c. 80 mph).Reported to dealer on last visit (airbag recall) who said nothing is wrong. Still makes a noise it didn't make before. |
supercharged 181hp 1.8L I4 5-speed shiftable automatic RWD
42560 mi $700 |
Auto trans did not provide usual creep-forward behaviour at idle and sluggish response at lower RPM. The computer may have been reflashed. |
supercharged 154hp 1.6L I4 6-speed manual RWD
49600 mi $3000 |
Oil in the transmission. Oil gasket required changing. |
268-horsepower 3.5L V6 7-speed shiftable automatic AWD
46500 mi | Transfer case (4matic) whining noise. I was told that bearings were shot. Due to the fact that transfer case is integral part of transmission housing the whole thing had to be replaced, luckily under warranty. 7G transmission cost $6500! |
228-horsepower 3.0L V6 7-speed shiftable automatic RWD
36700 mi | Transmission behaving oddly (longer than normal lag into reverse, delayed 2>3 upshift). Dealer reprogramed w/ TSB guidance and problem hasn't been occured again. |
228-horsepower 3.0L V6 7-speed shiftable automatic AWD
49000 mi US $800 |
007603 012102 O Parking Lever Cup (Seal) leaking transmission fluid. 013 997 7246 Transmission case seal leaking transmission fluid. |
60300 mi US $1000 |
There was oil leak that I was told was normal "wear and tear" for the 4matic. And cannot be covered by my extended warranty. |
197000 mi US $2800 |
Replace transfer box |
213200 mi US $2200 |
Left front axle & boots |
29760 mi C $400 |
transfer case oil leak |
turbocharged 134hp 2.1L I4 Diesel 5-speed shiftable automatic RWD
21700 mi | Auto gear Box rear seal leaking & replaced |
268-horsepower 3.5L V6 7-speed shiftable automatic RWD
47300 mi US $800 |
Transmission leak also needed to be fixed. |
268-horsepower 3.5L V6 7-speed shiftable automatic AWD
32200 mi C $400 |
Whining noise from the transfer case. The shop advised to wait and see. The cost quoted was only for the diagnosis. |
228-horsepower 3.0L V6 7-speed shiftable automatic AWD
124000 mi US $750 |
Corroded transmission fluid pan |
19014 mi | Check engine light comes on while driving. Brought to dealer, code shows that emissions system is inop. Left and right air pump switches get replaced. Issue is solved. |
16000 mi | Transmission fluid leak. transmission gasket replaced. |
69720 mi C $1675 |
Difficulty selecting forward or reverse. Conductor plate failure. |
76000 mi US $1700 |
Transmission Conductor Plate and Valve Body replaced. |
62000 mi | Leaky Transfer case |
52000 mi | 1. Fluid leaking from transfer case. Transfer case resealed. |
61000 mi | Catastrophic failure of the transfer case (part of AWD system). Since the transfer case is integrated with the transmission, the whole transmission was replaced. |
10840 mi | tranny leak |
12400 mi | Trans Fluid leak discovered by dealer. |
47740 mi C $2500 |
Replace torn cv joint cover. Requires whole new axle |
10000 mi | Transfer case inside of transmission developed high-pitch noise when vehicle was moving above 45 mph. Dealer determined problem as transfer case; Mercedes-Benz told dealer to replace entire transmission. Loaner car provided. Vehicle successfully fixed. |
74000 mi US $6671 |
Whining noise was diagnosed as transfer case bearing that cannot be replaced. Since TC is part of the transmission (4MOTION model) a re-manufactured transmission was installed. While this happens in the all-wheel-drive c300s, I consider it just an unlucky occurrence that I have one that failed. It is still a beautiful car and now it's pretty much bullet-proof! |
228-horsepower 3.0L V6 6-speed manual RWD
55000 mi US $10 |
Clutch pedal would become stiff when car is warmed up. Multiple attempts at resolving the issue were unsatisfactory. Settled on spraying low viscosity oil on the clutch master cylinder behind the dust boot. The stiffness is lessened, but persists. |
18000 mi | Needed to replace manual transmission |
268-horsepower 3.5L V6 7-speed shiftable automatic RWD
49000 mi | Transmission pan was leaking from service performed several months earlier. |
228-horsepower 3.0L V6 7-speed shiftable automatic RWD
6500 mi | Car Transmission Sport/Comfort indicator would go blank while driving. Car would then be in "limp home" mode. Torque converter needed replacement. |
119000 mi US $400 |
Shifter knob and shift plate replaced. Moved/slid when shifting from one position to another. Maintenance another $700. |
37000 mi | Sometimes when car slows to a stop transmission shifts early causing a jerking sensation via engine braking. Fix would require valve body change for $1500. Software updates can help, looking into DIY. Will probably end up living with it. |
228-horsepower 3.0L V6 5-speed shiftable automatic AWD
42000 mi | Reprogrammed the transmission torque converter. Repair seems to only be moderately successful. Will drive the car more to determine what to do next. |
42000 mi | The dealer repaired an internal transmission part. It seems to be corrected. We'll drive it some and see. |
201-horsepower 2.5L V6 7-speed shiftable automatic RWD
70000 mi US $1244 |
Replace turbine speed sensor. |
124000 mi US $900 |
The transmission conductor plate had intermittent signals causing the transmission to go into limp mode often. Conductor plate/TCM replaced and re-calibrated. |
40300 mi US $2500 |
A conductor plate went bad in the transmission. The transmission had to be mostly disassembled for the repair, so it was time consuming and expensive. It works perfectly now. |
201-horsepower 2.5L V6 6-speed manual RWD
140000 mi US $200 |
Clutch pedal pivot pin broke. It is a plastic component. |
362-horsepower 5.4L V8 5-speed shiftable automatic RWD
82300 mi US $1300 |
Had a seal on a sensor fail on my transmission which leaked fluid all over this electronics panel that sits under the tranny which causes the tranny to go into "limp mode" stuck in 1st gear. |
268-horsepower 3.5L V6 5-speed shiftable automatic AWD
35300 mi | Transfer Case was replaced under warranty. There was a deep sounding rumble when doing sharp turns out of park spots or during u-turns. It was also apparent at times when going in reverse. |
228-horsepower 3.0L V6 5-speed shiftable automatic AWD
154000 mi US $900 |
CV joint boots ripped. Replaced cv axle joints. |
51000 mi US $350 |
Excessive vibration at idle. Motor and transmission mounts replaced. Did not solve problem. Shop felt it was a transmission issue. |
81700 mi | Oil leaking from transmission. Bad seal from repair of balance shaft sprocket. Seal repaired, no charge. |
201-horsepower 2.5L V6 7-speed shiftable automatic RWD
65000 mi US $600 |
noise in left front tire. Has not been identified and corrected by dealer yet and has gone through 3 scheduled maintenance yet and they cannot find it. |
72000 mi US $1800 |
Transmission refused to shift until re-booted. Valve body and transmission cpu board were replaced. Mercedes covered the cost of the valve body under "goodwill". This left an $1800 bill for labor and the cpu board. |
58000 mi US $1250 |
Valve body replaced. Speed sensor failure. |
201-horsepower 2.5L V6 6-speed manual RWD
45000 mi US $1500 |
bad solenoid. 1500 bucks - caused engine to not shift gears. |
49000 mi | replaced the control module - now it works great - |
36000 mi | The gear shift had trouble going into reverse so I took it to the dealer. You can imagine my surprise when they told me it needed a new transmission! Fortunately, it was still under warranty so I'm not stuck with the $6,000+ bill. |
39000 mi | The reverse gear started acting up again, so I took it back to the dealer. The previous time, the only had to replace the reverse gear itself. This time they replaced the entire transmission. |
supercharged 189hp 1.8L I4 5-speed shiftable automatic RWD
53000 mi | Replace psv hose on supercharger. |
98000 mi US $25 |
Transmission Adapter Plug Leaking |
115000 mi US $250 |
Conductor plate replacement. Connector was leaking. |
57000 mi | Transmission leak. |
52000 mi US $317 |
Replaced the trans connector plug and topped off the transmission fluid that was lost due to the faulty connector plug. |
168-horsepower 2.6L V6 5-speed shiftable automatic AWD
133500 mi US $210 |
Replaced cracked wheel rim. Found a used replacement rim and saved a few hundred bucks. |
138815 mi US $500 |
axle seal replaced to stop oil leak |
165328 mi US $250 |
Front CV Axle rebuild |
166000 mi US $273 |
A shuddering sound when turning at slow speed. Transfer case fluid changed. |
169400 mi US $818 |
Replaced L/F outer CV boot |
175000 mi US $355 |
Replaced Right Front outer C/V boot Also new brake pads all around, new front brake rotors |
174488 mi US $92 |
'Groaning' Sound from Transfer Case during slow tight turns again! Transfer Case fluid change was recommended w/only 10,000 miles since last change! This C240 AWD model is known for this problem requiring the frequent changes |
60000 mi US $2000 |
and left inside CV boot and axle replaced. |
168-horsepower 2.6L V6 5-speed shiftable automatic AWD
40123 mi | Transmission replaced under original warranty. Apparently an inexpensive seal malfunctioned and let oil into the transmission casing somehow. Transmission started slipping on an uphill, I called dealer, they said drive it right in if that could be done. |
84000 mi | i never paid for new cv joints but that they had been recommended by mechanics for last 1.5 years. Cost was to be 2000 dollars. |
84000 mi US $3400 |
Replaced torque converter and Transmission Control Computer. Reflashed ECC and TCC to finally correct all the symptoms of the problem |
supercharged 189hp 1.8L I4 5-speed shiftable automatic RWD
42000 mi | Rattle in dash behind gauge cluster. Driver door handle replaced due to break at top of handle. Transmission seal replaced due to leakage. Serpentine belt replaced. Service B |
168-horsepower 2.6L V6 5-speed shiftable automatic AWD
73000 mi US $400 |
Trans. seal replaced. |
168-horsepower 2.6L V6 5-speed shiftable automatic AWD
12649 mi | Actuator, throttle control element |
supercharged 349hp 3.2L V6 5-speed shiftable automatic RWD
65000 mi | "Moaning" sound from tranny - result of leakage between cooling and transmission system due to faulty radiator. Apparently a known issue with C32s. |
supercharged 189hp 1.8L I4 5-speed shiftable automatic RWD
49300 mi US $1500 |
Conductor plate (along with sensors) was replaced, transmission was not shifting from time to time. It was a common problem when I googled it, thanks to the involvement of Chrysler during that time period. |
215-horsepower 3.2L V6 6-speed manual RWD
75000 mi US $1650 |
Replaced rattling clutch. The clutch was a standard clutch kit which included the disc, pressure plate, and slave cyl. The price for the kit is 750 and the labor was 900. |
76000 mi | Rattling transmission problem. The dealer confirmed it was a bad transmission that was causing the rattle. They didn't charge me anything for the inspection. But since then it hasn't rattled at all. |
168-horsepower 2.6L V6 5-speed shiftable automatic RWD
90000 mi US $2200 |
Torque converter failed due to poor M-B design. Cooling line routed through transmission leaked coolant into the transmission, causing Torque converter to fail. |
107000 mi | Hesitating after stop. Slight hesitation when climbing hills. |
84000 mi US $75 |
Leak at transmission "guide plug." |
168-horsepower 2.6L V6 5-speed shiftable automatic AWD
156000 mi US $1175 |
Front c.v. boots replaced by dealer, as other shops had to order the whole axle assemblies to repair, ($4,000+). So I had the dealer do it. |
70000 mi US $3000 |
Shifter made clicking noise, replaced |
215-horsepower 3.2L V6 5-speed shiftable automatic RWD
139500 mi US $500 |
Transmission was leaking ATF through seal where sensor is located. |
supercharged 349hp 3.2L V6 5-speed shiftable automatic RWD
86800 mi A $1100 |
Leaking transmission, Transmission solenoid. |
215-horsepower 3.2L V6 5-speed shiftable automatic RWD
134000 mi US $275 |
replace speed sensor conductor plate and new transmission oil, filter and gasket. |
168-horsepower 2.6L V6 5-speed shiftable automatic RWD
49803 mi | Warranty replacement of failed transmission. |
68974 mi | Replace failed rear main crankshaft seal |
76648 mi US $60 |
Replace transmission pan gasket and 13-pin connector |
133000 mi US $275 |
Replace shifter - switch inside bad |
supercharged 192hp 2.3L I4 6-speed manual RWD
53000 mi | Rubber/metal sleeve coupling |
63860 mi | Replace Transmission coupling, original dried out to rock hard |
supercharged 192hp 2.3L I4 5-speed shiftable automatic RWD
116000 mi US $600 |
Car stopped on highway. Transmission fluid leaked out. |
8-cylinder automatic 2WD
142762 mi US $2025 |
Replaced steering pump and steering pump reservoir. Replaced Transmission conductor plate. |