Seven problems related to timing tensioner have been reported for the 2012 Mercedes Benz C250. The most recently reported issues are listed below.
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.
My C250 has only 62,000 miles. Last month, ignition coil broke, so I spent about $300 to repair that. Only 2 days after I fixed the problem, the engine intake and exhaust cam shaft adjusters, timing chain tensioner broke. Total repair cost of about $4,000. How can a vehicle that has only 62,000 miles have all those major mechanical problems? I know I purchased a lemon. I called and talked to benz customer service rep in new york area. Originally he told me that he sure made it sound like they benz will pay for a big chunk of total repair bill. And promised to me that he will get back to me with an answer within few days. I called him many times and my wife called him as well. Never a reply for over a month. Out of frustration, I tried to find his supervisor. Only after I try to talk to his supervisor, the customer rep called me up and offer 10% of repair cost. He blame me for not taking my benz to for all mechanical issues during possession of my vehicle. That is the reason why benz offered to pay for 10% of repair cost. So I told him. Benz salesman never mentioned that to me. If in fact, I had to take my vehicle to benz dealership for any repairs to get better service discount, I would have taken it to benz dealership. They never mention no such thing, and now making excuse to blame me for them selling me a lemon. I am so disappointed by quality and customer service of Mercedes Benz company.
The contact owns a 2012 mercedes-benz C250. When starting the vehicle, there was a grinding noise coming from the engine and the check engine warning indicator illuminated. The vehicle was taken to g2 automotive mercedes-benz (5935 parkway north blvd, cumming, GA 30040 phone number: (678) 515-9807) where it was diagnosed that the engine needed a new timing chain tensioner replacement. The vehicle was being repaired. The manufacturer was not contacted. The approximate failure mileage was 70,000.
The contact owns a 2012 mercedes-benz C250. While attempting to start the vehicle, the contact noted a choking and knocking sound in the engine. The check engine indicator also illuminated. The vehicle was taken to a dealer where it was diagnosed that the cam shaft tensioner failed and needed to be replaced. The vehicle was repaired, but the failure recurred. The check engine indicator did not illuminate this time. The vehicle was taken to the dealer again where it was diagnosed that the cam shaft tensioner on the other side of the engine failed and needed to be replaced. The vehicle was not repaired. The contact attempted to notify the manufacturer, but the contact was placed on hold for 1. 5 hours and then disconnected. The approximate failure mileage was 57,000.
Dealer said the camshaft adjuster with chain tensioner needs to be replace at 65,000 miles. Also the high pressure pump needs to be replace too. This after spending over $773. 06 hundred dollars on engine analysis. I decline the service because it will cost me $5,324. 98 to get the job done. Could this be a safety recall because the dealer said one of this days it might just stop on the middle of nowhere. Now I am driving this vehicle with the check engine light on because of the problem I mention above.
Ref: NHTSA id number: 10676804 summary: camshaft intake adjuster replaced thermostat seals replaced chain tensioner replaced my 2012 mb C250, while still under warranty by year and mileage, was declined to be service by Mercedes Benz of cutler bay, florida. There reasoning is that I did not use a mb oil filter; they have cancelled my warranty. Even though I have done all the proper oil changes sooner that the mb recommendations.
Camshaft intake adjuster replaced thermostat seals replaced chain tensioner replaced.