The components of the engine being the camshaft adjusters, timing guide, timing chain, valves and pistons that all work to deliver power are faulty and have failed literally mid-drive. I was on a busy interstate during rush hour and nearly lost control of the vehicle as it just powered out while driving at 70 mph then forcing a semi to nearly terminate myself and family. The dependability and safety is abruptly ripped out from underneath you. Without even being able to control the vehicle and it coming to an abrupt, unsafe hault. There were no warning signs. The vehicle has since been looked at and informed me that an extended warranty is in place for half of all the parts and labor above.all should be covered and for safety.my nerves are a wreck and without a way to afford an entirely new engine I am left to contend with car payments for an unsafe undrivable vehicle. Since then the dealership recognized my concerns but has since stated that without a modification to the extended warranty or it being made a recall that there is nothing that can be done.

- Celebration, FL, USA

The contact owns a 2013 Mercedes-Benz C250. While driving 60 mph, the vehicle began to hesitate and lose speed. There were no warning indicators illuminated. The vehicle was taken to park place motorcars Mercedes-Benz dallas (located at 6113 lemmon ave, dallas, tx 75209, (214) 736-5753) to be diagnosed, but the failure could not be duplicated. The failure continued. The vehicle was taken to park place motorcars Mercedes-Benz arlington (located at 4201 beltway pl, arlington, tx 76018, (833) 666-5434) where it was diagnosed that an unknown component within the transmission needed to be replaced. The vehicle was repaired, but the failure continued. The vehicle was taken to park place motorcars Mercedes-Benz fort worth (located at 5601 bryant irvin rd, fort worth, tx 76132, (817) 310-9745), but the failure could not be duplicated. The vehicle was taken to park place motorcars Mercedes-Benz grapevine (817-310-9748, located at 1300 texan trail, grapevine, tx 76051), but they were unable to duplicate the failure. The vehicle was taken to Mercedes-Benz of plano (located at 6455 dallas pkwy, plano, tx 75024) where it was diagnosed that the solenoid needed to be replaced. The vehicle was repaired, but the failure recurred within days. The manufacturer was notified. The failure mileage was 100,000. Consumer stated this is my second complaint to Mercedes Benz, my 1st complaint 11-4-19. The last time visit of 10-14-19 my car was towed in due my car slowing down and received a light on car overheating and I was 5 minutes in driving. I called my aunt to let her know what my car was doing and it was slowing down drastically, so she could get behind me. I was able to safely pull over. I popped the hood and saw nothing but smoke. Once I cut the car back on I saw there were the fluid was coming from which was a hose from the coolant and the tow guy was able to tell me what it was.

- Dallas, TX, USA

Check engine light code, P0340, camshaft position sensor. Problem includes difficulty starting car, engine knock upon start, and misfires accelerating to pass at highway speeds.

- Salinas, CA, USA

I was on I-95 and the car just started shaking and would not accelerate, very dangerous. The car also has a dangerous lag when trying to accelerate. I was trying to accelerate making a U turn to on coming traffic and the car wouldn't accelerate nearly causing a catastrophic life threatening accident. I have had my car at the dealership for 3 months trying to fix the problem and to date every time I get it back the same thing happens. My paperwork is with my car that has been at the dealership since for 3 months.

- Lake Worth, FL, USA

While driving the vehicle one day the check engine light came on, code 0340 for a camshaft sensor. Both sensors are replaced, light returns in two days and all problems persist. Vehicle has a long crank, when diagnosed as the timing chain and timing chain tension($4400 of work). Vehicle has 66K miles. After further research this is a fairly common issue. In the uk and australia Mercedes was forced to pay for repairs because of consumer protections. I've noticed a reduction in my ability to speed up quickly and I've read anecdotes of people's cars stopping dead on the freeway because of this. This is a manufacturer issue and major safety concern. Https://mbworld.org/forums/C-class-W204/680776-C250-timing-chain-issues-still.html

- Laveen, AZ, USA

While merging onto the highway my mb C250 with 58K miles shifter suddenly into 2nd gear. I moved onto the shoulder and stopped the car. The engine light immediately illuminated. I turned the car off. When I started it again the light was still on. When I shifted into drive there was a loud sound and the car julted forward. I shift back in park but it repeated the sound and jerk. I I shifted into drive again (same sound/jerk) and proceded at 30mph on the shoulder of the highway to a german auto repair shop close by. They checked the engine codes and told me that the entire transmission system must be replaced. They said that according to the combination of codes that every major component of the transmission was shot. They said that there is no specific reason this would happen because my transmission fluid was full and clean and the engine didnt have enough miles for so many different parts to have worn out yet. They also said they to reset the computer but the car went back into "limp mode" and all codes came back. The transmission cost plus labor is $4150. This would have been covered by warrentee. Upon investigating this model and the perticular transmission in my car (221.9) I found hundreds of owners with the 221.9 have had the exact same problem. This transmission has been put in multiple mb vehicles for the past decade and randomly owners report thier cars going into limp mode and needing new transmissions. I believe Mercedes has neglected to recall the problem beccause that transmission is used in several models for many years and they do jot want to be responsible for so many repairs. Please let me know if there is anything I can do to help mb take responsibility for this faulty system.

- Sugar Land, TX, USA

When accelerating at highway speeds (mostly) check engine light comes on and car shakes. If you pull over and restart the car most of the time the check engine light goes away. The engine error code (from Mercedes) is P03001 which is a cylinder misfire. I purchased this car brand new and have had it at the dealership 8 times now for the same problem. They have replaced the fuel pump and injectors and problem still persists. Mercedes dealer is telling me there is nothing wrong with the car and they can't duplicate the problem after a week with the vehicle. The car is very dangerous to drive. This has happened to me no less than 20 times in 2 years of owning the vehicle. My son has been in the car with me several times when this has happened and it is a safety hazard to be at highway speeds and the car can no longer accelerate and starts to decelerate. Mercedes needs to do something about this before someone (namely me) dies because of this known issue. They have known about this with an internal document since October 2012 yet they continue to ignore the problem.

- Gainesville, FL, USA

Long pause when trying to accelerate from a stop. Not normal turbo lag, it's too long.

- Tacoma, WA, USA

I've been experiencing a hesitation when accelerating in my 2013 Mercedes Benz C250. The back seat belts stopped working. The passenger airbag light all of the sudden now states it is off.

- Porter, TX, USA

The contact owns a 2013 Mercedes Benz C250. While driving approximately 60 mph, the vehicle decelerated and failed to accelerate as the traction warning light illuminated. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was 10,000.

- Douglasville, GA, USA

While driving to grocery store attempted to accelerate from a stop and vehicle bogged down (decelerated before accelerating) and the violently took off.. have taken vehicle 8 times to different Mercedes Benz dealerships in the atlanta area only to be told that its the way vehicle is and to live with it. On many occasions while attempting to turn across traffic vehicle just stays in place when accelerator pedal is depressed and then it just bolts wanting to let the rear end loose. Very unsafe characteristic of this car. Regret this purchase tremendously. Also many many complaints about the 2012-2014 C250 and nothing is being done.

- Smyrna , GA, USA

I've been experiencing a hesitation when accelerating in my 2013 Mercedes Benz C250.

- South San Francisco, CA, USA

Sluggish accellaration. This has happened several times during the last 2 months. It has happen on a take off from a red to a green light. Where I'm completely stopped and from 0 mph speed I start to accellarate & the car feels like it stalls, almost as if it's getting no fuel. I can have my foot totally down on the gas pedal & the car hesitates or doesn't move at all. I had an incident where I was behind a semi truck, I attempted to change lanes fast before incoming traffic. The car did not move & I almost got hit from behind because the car would not speed up when I tried to accellarate. I've had my best friend in the car while this took place & he was very scared & so was I. I'm not sure if the fuel injectors are pumping the gas fast enough to get the car moving. Then again, what do I know. I'm a girl. All I know is, something is wrong with this car & it's not safe to drive. This does not happen every time but it happens quite too often. I'm to the point now where I don't trust passing other cars and I'm extra cautious when having to pass cars or from lane to lane. I don't trust this car. I've contacted the dealership today & have an appointment to meet with max at the dealership in anaheim hills, ca. I'm hoping I can have an early termination of my lease or get into another car (hopefully a safe car).

- Victorville, CA, USA