Engine And Engine Cooling Problems of Mercedes Benz S550

Brought my vehicle to my mechanic because of noise that recently appeared in my car. To my surprise the mechanic stated that my engine is completely failing and would require an entire new engine. I purchased this car less than two years ago with an estimated 79,000 miles. Vehicle currently has an estimated 112,000 miles. Never missed a service interval for the vehicle. Now several components of the engine are completely failing.

See all problems of the 2015 Mercedes Benz S550 🔎.

I’m reporting a serious safety issue with the balance shaft sprocket in my mercedes-benz S550 (m273 engine, 273. 968). This is a known defect that causes the sprocket to wear out far too early due to poor material design. When it wears, it throws off the engine timing, leading to check engine lights, rough idling, reduced power, and even stalling. In some cases, the engine can shut down while driving, which is a major safety risk. Thousands of people have experienced this exact problem, and it’s all over mercedes forums, reddit, and technical bulletins. Mercedes quietly updated the part in later models, which shows they knew the early ones were defective. Some people got repairs under warranty or “goodwill,” but most of us are stuck with thousands in repair bills for something that clearly shouldn’t have failed. This isn’t just a mechanical issue—it’s a safety concern. Imagine merging onto a highway or turning through an intersection when the engine loses power. That’s a real risk with this defect. Mercedes should be held accountable, and NHTSA needs to investigate and push for a recall before someone gets hurt or worse.

See all problems of the 2008 Mercedes Benz S550 🔎.

Cylinder wall 2 and 3 scorn horribly. Coolant leaking into cylinder 2 & 3. Dealer recommendation of new motor due to bad block. German auto works and carstoreusa wichita KS both recommend new motor and have advised of many of same motors being recalled by Mercedes Benz. I also spoke with Mercedes Benz north America. The heads were replaced in 2022 already and have under 10k miles on motor since repair.

The contact owns a 2014 Mercedes Benz S550. The contact stated that while the vehicle was idle, an abnormal, ticking sound would emit from the vehicle without warning. The contact also stated that he began to notice oil spots in his driveway after parking the vehicle. The vehicle was taken to a dealer where a diagnostic showed that the oil filter housing was defective and needed to be replaced. The contact was then given a list of other parts associated with the oil filter housing that also needed to be replaced. The manufacturer was notified of the failure and was informed that there were no recalls on the vehicle. The vehicle was not repaired. The failure mileage was 89,677.

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B camshaft position timing over-advanced or system performance bank1 a camshaft position timing over-advanced or system performance bank 2 and Mercedes Benz didn't want to fix this problem and just wanted to change out the engine for 50 thousand dollars. The car is a 2017 w222 Mercedes Benz S550 s class with a m278 engine.

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Catalytic converters are factory defective my vehicle has less than 80k miles and used as pleasure vehicle. The problem has been inspected and confirmed by a reputable independent service provider. Warning lights came on and upon inspection it was determined that 3 catalytic converters are defective. My spouse also complains about a bad odor when vehicle is on but not running.

See all problems of the 2016 Mercedes Benz S550 🔎.

I drove my 2015 Mercedes Benz S550 4matic approximately 20 miles to work, parked in the parking lot and about 30 minutes later, I was alerted by pembroke pines police (case# pppd22off050792) that my car was burning when I got to the parking lot pembroke pines fire dept was in the process of extinguishing a catastrophic fire in the engine compartment. The car drove problem free to that point. No warning lights, no smoke, no smell, no leak. The car was in excellent condition prior to the fire with approx 93000 miles. I had the car serviced by mb fort lauderdale 1 month before the incident and no unresolved maintenance issues were found. After the fire geico insurance took possesion of the car and mercedes USA was granted access. After multiple attempts havent been able to make contact with mbusa since then, no callback.

I brought a car from a car dealer in tampa florida and when I got the car I noticed that the car would not pickup speed after pressing the gas pedal and it was asking me to turn off the engine or it will fail . Also when I tried to put in coolant. I seen a milky substance that was coming out of the hoses and in the overflow tank of the coolant reservoir which indicates issues with the heads or head gasket . Also the title I got says salvaged which I asked if there was anything wrong with the car and the car dealer told me no . Never disclosing that the car has been salvaged . There are other issues with the car that I forget because of so many issues with the car that I cant keep up with and I want to return the car to the car dealer and get my money back and have tried but they refuse to make good on the sale.

See all problems of the 2007 Mercedes Benz S550 🔎.

Vehicle cut on fire while sitting lucky outside, the corner of engine passenger side bellow the headlight stores the suspension air pump and electric hydraulic steering pump. . Base on my inspection the ehps heated and set on fire. Someone saw the car on fire and called fire dept. . Car was lock and store after hours.

See all problems of the 2012 Mercedes Benz S550 🔎.

Advised by service advisor need to replace me control unit(ecm), costing $2,000. 82. Less than 5 years ago suspension costing 2,000. All work done at Mercedes Benz of south orlando.

Tl-the contact owned a 2018 mercedes-benz s500. The contact stated that after driving the vehicle for approximately 3 minutes, the vehicle was parked. The contact stated that he was then informed by a person at the residence helping with moving that there was smoke coming from under the hood of the vehicle. The contact stated within 30 seconds to a minute the vehicle became engulfed in flames. The fire department was notified and were able to extinguish the fire but not before the engine compartment was destroyed. A police report and a fire report was filed. There were injuries sustained. The vehicle was towed to mercedes-benz of caldwell, 1220 bloomfield Ave, west caldwell, NJ 07006, (973) 227-3600, to be inspected. The contact was not provided a prognosis for the fire. The vehicle was not repaired. The manufacturer was contacted and informed of the failure. The approximate failure mileage was 39000. The vehicle was destroyed. Ah.

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Tl-the contact owns a 2007 Mercedes Benz S550 w221. The contact stated that while pressing the gas pedal the vehicle will leak fuel. The strong smell of fuel is apparent inside and out of the vehicle. No warning lights illuminated. The vehicle is currently at knoxville Mercedes Benz awaiting diagnoses 10131 parkside dr, knoxville, TN 37922 (865) 777-2222. The vehicle was not repaired. The manfacturer was not made aware of issue. The failure mileage 51,500. Jw.

Error code p0019 cam sensor bank b, manufacturers used defective part that timing sprocket teeth have eroded due to defective parts used which have and will cause vehicle to stahl while running. Both front struts wear on all models that cause driving conditions that can cause death while driver excelration or stopping cause.

Tl the contact owns a 2011 mercedes-benz S550. The contact stated that the vehicle caught on fire while parked. The contact was able to extinguish the fire with the extinguisher located underneath the vehicle. The vehicle was towed to an independent mechanic who determined that the engine harness leading to the oxygen sensor was the cause of the fire. The vehicle was not repaired. The vehicle was towed to house of imports (6862 auto center dr, buena park, CA 90621, (714) 627-5553) for diagnostic testing over a month ago where it was still awaiting a diagnosis. The manufacturer was notified of the failure and a case manger was assigned. The contact sent pictures of the vehicle and failed parts to the manufacturer. The failure mileage was approximately 118,000.

See all problems of the 2011 Mercedes Benz S550 🔎.

Balance shaft/idle gear material wore out causing timing chain to become loose and engine to jump timing while driving. Engine locked up and died while going down the highway! expensive repair that Mercedes Benz knows about!! they have an internal memo with a list of VIN numbers that have the faulty idler gear that wears out prematurely but won't recall the product because it usually wears out just after warrantee period! something must be done!.

I was driving my S550 and came to a red light. I stopped at the light and when it turned green, I took my foot off the brakes and pressed the accelerator, but there was to response to pressing the accelerator. The car rpms were increasing but the vehicle was crawling at less than 5mph. This led to me pulling over and parking the vehicle and turning it off. I waited 5 minutes and then restarted it and it began to work normally. The second time this happened was while making a left turn, I pressed the gas pedal and there was no response and the car was reving but traveling less than 5 mph with oncoming traffic having to stop short to prevent crashing into me while I was making the left turn. This was again resolved with me parking the vehicle, turning it off and then restarting it. After the second time this occurred out of no where I decided its a very dangerous safety issue.

The contact owns a 2008 mercedes-benz S550. The contact stated while driving 40-50 mph, the vehicle was shuddering intermittently. The contact stated that the failure recurred while at a complete stop. The check engine warning light was illuminated. The contact stated that the failure had been recurring intermittently. The vehicle was taken to an independent mechanic, where it was diagnosed that the wiring harness was misfiring. The mechanic related the failure to an unknown recall. The dealer was notified of the failure. The manufacturer was notified of the failure and referred the contact to the NHTSA hotline for assistance. The failure mileage was approximately 40,000.