Timing Tensioner Problems of Mercedes Benz E350

Car was purchased from mercedes dealership in 2016 and has only been seen by mercedes dealerships for service. In 2019, a oil seepage was noted during annual maintenance however no repair or diagnosis was performed. At this time, the car only had 36,000 miles on it. In Nov of 2020, the car was taken in to the same dealership for annual service. The car now only had 40,000 miles but was given a 50k service. At the time of service, the technician explained that oil was leaking from the engine cover and had also contaminated the drive belts. Repairs to engine cover, belt and tensioner came to $3000+. Dealership had no explanation for why after such a short time with limited driving, the car had such significant repairs needed. A tire pressure sensor had also failed. From my research this issue is known, however should not be happening to a car beginning only 5 years after of manufacturing with less than 37,000 miles.

See all problems of the 2014 Mercedes Benz E350 🔎.

'experienced rattling sounds and took vehicle for inspection to mercedes-benz of tucson (mbt) on 5/9/18 'inspection found secondary chain tensioners producing rattling noise until oil pressure is built up. Est cost of repairs $1497. 94. Receipt reads: no consequential damage to be expected 'July 2018 check engine light. Autohaus tucson found engine light related to damaged temp sensor wiring; repaired pack rat damage wiring for ambient temp sensor 'oct 2019 check engine light on; mbt inspection; diagnosis: fault code #p001685-position of intake camshaft is implausible to the position of the crankshaft bank 1; engine out of time due to cam adjuster failure 'mbt stated that they could start repairs until after 11/18/19 as the specialty tech was unavailable 'contacted mbt regularly until they were able to take vehicle in on 12/2/19. 'to date,vehicle has been in the possession of mbt for 119 days 'cost and diagnosis have grown exponentially from $1497 to a whopping $12,000 for extensive engine repairs! 'mbt stated that after repairs were completed, the engine did not operate properly, and they would need to 'break the engine down' again to find the problem 'found the engine was cracked and the cost reflect problems found inside the engine after subsequent repairs were completed 'I have maintained regular maintenance schedules and question whether such damages result from neglect on the part of Mercedes Benz of tucson or of a manufacturing flaw of the 2012 E350 engine. Neither is satisfactory 'to date, mbt have not supplied me with any tech notes or verification of said damages/repairs 'requesting your assistance in determining if problems exist with the flawed service of Mercedes Benz of tucson or of a much larger issue with flaws in the manufacturing of 2012 E350 engine. 'at this point, I am not confident that the vehicle is safe to drive.

See all problems of the 2012 Mercedes Benz E350 🔎.

I have shown the car to dealer and they say I have ppay $4000 for repalcement of chain tensioner. The same time for second openion I showed the car to another expert, they say that if the tensioner was bad engine light will apear and car will not run. The car does have 100000 miles power train warranty and my car services at dealership since I bought it. When I start the vehicle it sound like some parts sound hitting body of engine. Also they say that this car come with hydrolic pump pushes oil to top of engine may be the problem. But they want to charge me $4000.

See all problems of the 2013 Mercedes Benz E350 🔎.

Was told to replace the serpentine belt tensioner. Asked why the belt tensioner needs to be replaced was told that they give out and if you are driving it could cause an accident. This is before the replacement cycle for the belt (90k miles). So many people won't know this will happen creating accidents that could be avoided.

See all problems of the 2010 Mercedes Benz E350 🔎.

The contact owns a 2012 Mercedes Benz E350. While the vehicle was parked and the key was removed from the ignition, the vehicle jerked and rolled backwards before stopping independently. In addition, the contact heard an abnormal noise and the vehicle veered to the left when reversing. The dealer was unable to diagnose the failure but made the following repairs: the cover on the front passenger side cylinder head, removed/installed a seal, non-return valve, chain tensioner, sealant mb, flange gasket, hexalobular bolt, the cover on the front driver side cylinder head, removed/installed a seal, left and right secondary drive chain tensioners, front cover cylinder, and the check valve. On another occasion, the vehicle rolled in reverse and crashed into the bumper of another vehicle. The door of the vehicle bruised the contact and medical attention was required. The vehicle was towed to the dealer. A police report was not filed. The dealer was not able to diagnose the failure and the vehicle remained at the dealer. The manufacturer was notified of the failure. The approximate failure mileage was 5,597.