2012 Mercedes-Benz C250: hesitation when accelerating

Filed Jul 1, 2020 · Engine · 78,982 miles · WA

In a mercedes benz c250 2012-2014 there has been many reports across the united states where camshaft adjusters+timing chain components fail/break. This is a highly risk and safety matter that needs to be addressed by mercedes benz as recall. Being newer model cars, the timing chain and camshaft adjusters should not fail. Not even at 100k miles. Some of these models has had their camshaft adjusters+ timing chain fail at 46k miles. Why is mercedes not owning up to these factory faults? Why are new models that are not even 10 years old have this kind of issue? This defect can cause major accidents on the road. Cause you go at highway/freeway speed 60 MPH and your timing chain breaks, you can cause a major accident with other cars, and injure your own self and passengers. Can you imagine for those who have babies and drive these vehicles. Why is a hugecompany like mercedes not owning up to these defects? Instead they want to charge $4,000-$8,000 to get this repair done. Even if you have warranty they still hesitate on getting this repair done. I just want to be heard because being one of the many reports with this issue on these vehicles, it's concerning to see many of these vehicles still out on the road. When these parts have are failing, you will get a check engine light that reads "p034062" camshaft position sensor bank 1 electrical failure" after getting diagnosed by many shops, and even mercedes benz dealer all the test say the wiring and everything else is ok. Camshaft adjusters are failing will need replacing + timing chain & tensioner. But why on such a newer car? It should run about 200k miles until it needs a new timing chain. Cars being serviced at correct interval & being well maintained. This should not be a issue. Engine when start up will rattle. It will sound like engine is falling apart. Plus car will run really rough.

Filed Jun 4, 2019 · Engine · TX

My c250 started making a noise when you first start the car. Choking and hesitations to start, but yet would start after a moment or 2. The noise was unfamiliar. This noise would continue through out the day, as long as the car set for more than 15-20 minutes. I would go into the store, to shop come back out to the car an the noise would still be there after 15-20 minutes. I took my car to the mercedes benz dealer in houston, texas north. After a $200 diagnose cost. The cam shaft adjuster is out. Costing another $4,575.68. My car is a 2012, which I brought in 2014 with less than 7,000 miles. Now it is 2019 with only 87,885 miles on my car, I don't know what this part is for or why my car needs this. All I know it cost $4,575.68. Way to much for something I know nothing about. Can't get in touch with manufactory to complain and mercedes headquarter hasn't return my call. Please give me advise, as to what to do with my complaint.

Filed Apr 27, 2019 · Engine · 46,000 miles · CA

Dealership diagnosed problem with camshaft adjusters. This happened 2 times already on the same vehicle, and it is very costly to fix ($4000). First time I had a rattling noise from engine, and check engine light on. First time it happened at 46k miles. Second time car hesitates to start, had long cranking, it happened at 69k miles. It is a systematic, very costly and potentially life threatening problem.

Filed Apr 27, 2019 · Engine · 69,000 miles · CA

Dealership diagnosed problem with camshaft adjusters. This happened 2 times already on the same vehicle, and it is very costly to fix ($4000). First time I had a rattling noise from engine, and check engine light on. First time it happened at 46k miles. Second time car hesitates to start, had long cranking, it happened at 69k miles. It is a systematic, very costly and potentially life threatening problem.

Filed Aug 5, 2018 · Engine · 41,000 miles · FL

Engine light came on , the car hesitated to turn on at times, sometimes had to press the gas pedal to have vehicle turn on. Took it to local benz shops that claimed to work on benz, they said their computer could not determine the code. So took it to the dealer in fort myers, fl. Was told it was the timing chain and the 2 cam shafts. Was quoted $5032. So had to other choice than to have them repaired. Only received the managers discount of $150 (wow). I read that many other owners have the same problem and they will not recall . They have recalled older models like 2006 for this same type of issue. But of course seems that mercedes benz has no prestige. Also note this car only has 41,000 miles in mint shape take good care of it. Very , very disappointed with mercedes benz, don't get stuck buying a vehicle that is not dependable. This model has too many issues.

Filed Sep 30, 2015 · Driver assistance, Fuel system · FL

Car showed signs well before vehicle started showing codes. When I would start it up the vehicle sounded like a rocket ship was about to take off and shortly after the noise would go away. With no codes mercedes tried replacing the some AC parts but it didn't help. I just assumed the noise was harmless if mercedes says nothing's wrong than it must be okay. Then one day I went to turn the car on and it hesitated making all kinds of noise but always started after holding the key in the on position and pushing forward. Car seems to work well once started but I am using more gas which might be related.the check engine light came on afterwards and would turn itself off. After bringing it to mercedes they state I need a new intake variable camshaft adjustor and it's a good idea to replace the exhaust as well since there's no charge for additional labor since the exhaust adjustor is going to be accessible. My car is at 68,000 miles and well kept this is a mechanical issue with mercedes in multiple models and years.