Hi everyone,I'm the owner of a Mercedes C180 W206 with M254 engine. At only 61,000 km, the variable synchronization system (camshaft adjuster/variator kit) has completely failed.Fault codes confirmed by Mercedes authorized workshop:🔴 P001104🔴 P001200Mercedes Tunisia distributor officially confirmed the fault in writing (09/02/2026) but only offers 35% discount.Mercedes Board of Management in Stuttgart gave their "final position" — same 35% offer.My car has been immobilized for over 40 days.Has anyone experienced the same issue on the M254 engine? Is this a known defect?I have all official documents available.Case reference: 20407158

 

 

I've heard this is a common issue with the m254 but your engine is a m264

 

Thanks for the reply. My car is definitely the new W206 with the M254 engine. The codes P001104/P001200 are confirmed by the dealer. I am now taking legal action in Tunisia as the 35% offer is unacceptable for a known manufacturing defect. Your confirmation that this is a 'common issue' helps my case tremendously!"

 

Hi everyone,​Following up on my previous post regarding the M254 engine failure (Codes P001104 / P001200) at 60,000 km.​I just received a crucial technical update from another owner on Reddit (see attached screenshot). It appears the 'Camshaft Adjuster' failure is caused by a structural design flaw: the wire mesh on the oil control valve breaks off and sends metal debris into the camshaft, causing catastrophic synchronization failure.​This issue has now been reported and documented in Singapore, China, and Malaysia.​My dealer in Tunisia is currently trying to blame 'maintenance' to avoid a 100% warranty claim, but this evidence proves it is a manufacturing defect known globally. I am taking this evidence to the Ministry of Commerce and the Consumer Protection Organization tomorrow.​Has anyone else here found metal debris or 'wire mesh' fragments during their engine teardown? We need to document this to force a global recall.​@MercedesBenz — The world is watching.​#W206 #M254 #Camtronic #ManufacturingDefect #Case20407158"

 

Merc Benz are aware as they have released an internal document which can be found online

https://static.oemdtc.com/NHTSA-PDFs...28827-0001.pdf

 

You are absolutely right. I have managed to obtain the official XENTRY Tips document (LI05.20-P-080257) dated February 13, 2026.

​This internal bulletin explicitly links the M254 engine fault codes (P001100, P001104, P001200) to a structural failure of the wire mesh in the oil control valve. Mercedes even illustrates the 'optimized' replacement part, which is a clear admission of a design flaw in the original component.

​I am using this document as the centerpiece of my legal case tomorrow. My post on X has already reached 15,500 views, showing that the global community is watching how Mercedes handles this.

​If anyone else has a local case number or has been denied warranty despite this XENTRY bulletin, please share it here. We are stronger together."

 

Wow I just love how driven you are but is there a way to avoid the issue before it happening , also I get vibrations at low rpms rarely does that mean it's on it's way out

 

Thank you — and yes, those vibrations at low RPM are exactly the early warning sign. That is how my case started too. Do not ignore it. To answer your question directly: the vibrations at low RPM combined with occasional rough idle are the classic early symptoms of the filter screen beginning to fail inside the central valve. At that stage the damage is not yet catastrophic — but it is progressive. Once the screen breaks loose completely, debris enters the camshaft and the repair becomes significantly more expensive. What you can do right now: 1. Get a diagnostic scan immediately — ask for fault codes P001100, P001104, P001200, P001400, P001404, P001500. Even if no warning light has appeared yet, stored codes may already be present. 2. Ask your Mercedes dealer or independent workshop specifically about the central valve / oil control valve on the camshaft adjuster. Reference bulletin LI05.20-P-080257 and ask if the updated central valve with the optimized holding ring has been fitted to your vehicle. 3. Document everything from today — date, mileage, symptoms. If the failure progresses, you will need this paper trail to support a warranty or goodwill claim. 4. Check your production date — vehicles produced before September 2022 appear to be the most affected batch. The honest answer is: if your car is still under warranty, push for the updated central valve to be fitted proactively before the screen fails completely. If it is out of warranty, the diagnostic scan will tell you how far the deterioration has progressed. What is your current mileage and production date?

 

My car was produced 11/22 and my current mileage is 45,000 km an im going to scan in couple a days hopefully nothing shows, im on warranty but the car rarely vibrates on low rpms im probably just paranoid

 

You're not paranoid — you're actually in the best possible position right now and here's why you should act immediately. November 2022 production puts you right in the affected batch. At 45,000 km you're approaching the risk zone where failures have been documented (30K, 48K, 60K, 61K km across multiple cases). Most importantly — you are still under warranty. This is critical: if the scan shows early fault codes (P001100, P001104, P001200, P001400, P001404, P001500) even without a warning light, Mercedes must repair it under warranty. Once your warranty expires, you lose that protection entirely. When you go for the scan, do the following: 1. Ask the technician specifically to check the central valve / oil control valve on the camshaft adjuster system2. Reference bulletin LI05.20-P-080257 and ask if the updated central valve with the optimized holding ring has already been fitted to your vehicle — if not, request it proactively under warranty3. Get everything in writing — the scan results, any stored codes, and the technician's observations4. If they find anything, do not let them dismiss it as minor — push for the updated part replacement immediately while you're covered The rare vibrations at low RPM are exactly the early symptom. Don't wait. A warranty repair costs you nothing. The same repair out of warranty cost me over 2 months of immobilization and an ongoing legal battle. Please report back after the scan — your case could be very valuable documentation.

 

There should be a recall for this problem. On Chinese Tik Tok, many video say this is a common problem. Now I am worried even I just have 5500 miles. I am still under warranty now but my car is smooth and no vibration or anything. Will the dealers replace this part for even though there are not symptoms now?

 

This thread should be stickied up top. As people put in more miles on their car, more people will have this problem. Its a very expensive repair. Repair at dealer can cost from $30k to $60K Yuan in China depending on the degree of damage. That's $4000 to $8000 US dollars. I don't know how much it cost here in the US. Maybe I should have bought a Lexus instead. Effected cars are from 2021 to July 2024. That's a lot, my car is 2023 so I am effected too. Anyway to know for sure you actually have this faulty part.



Google translate

 

I completely share your concern. Even if your car feels smooth at 5,500 miles, the XENTRY Report (LI05.20-P-080257) issued on February 13, 2026, proves that this is a hardware design flaw (the wire mesh filter) and not a maintenance issue.​Wait until the symptoms appear is dangerous because metallic debris can contaminate your oil circuit and threaten your crankshaft. Dealers usually refuse to replace parts without symptoms to save money, but since Mercedes has already designed an 'optimized part', they know the original one is defective.​We must unite to force a global recall. I am currently taking this to the Ministry of Commerce and the Consumer Protection Agency to set a legal precedent.
Strength in numbers is the only way Stuttgart will listen. Keep the pressure up!"

 

Actually I saw this w206 common problem yesterday on Chinese tik tok. So I think it’s starting to get notice since cars are getting into the 40k to 60k miles and the central control valve mesh plastic is failing. You should also start a post over at benzworld.org too. We need a recall on this. The repair cost is way too much, how much did you spend to fixed your car?

It’s very important for a recall to not just repair when symptoms show up but before it shows up.

 

The Chinese TikTok visibility is exactly what I expected — as more cars reach the 40K–60K km range, this issue is going to explode globally. It’s only a matter of time before it becomes impossible for Mercedes to contain. To answer your question: I have NOT repaired the car yet — and this is a deliberate decision. The reason is serious: Mercedes’ own internal bulletin (XENTRY Tips LI05.20-P-080257) states that when the filter screen breaks loose completely, metal debris can travel through the oil supply bore into the camshaft bearings and cause deeper structural damage. The full extent of the damage cannot be confirmed until the engine is opened. If I proceed with repairs before Mercedes accepts full responsibility, I risk paying for a partial fix — only to discover more extensive internal damage that they will then refuse to cover. My car has been immobilized for over 2 months, but I am not willing to pay for a repair that masks a potentially deeper defect caused by their design failure. This is precisely why I am pushing for a recall. A recall would mean:- Mercedes bears the full cost of inspection and repair for all affected vehicles- Hidden internal damage is properly assessed, not just the visible parts replaced- Owners are not forced to pay out of pocket for a manufacturer’s design error I will absolutely open a thread on benzworld.org — thank you for the suggestion. The more platforms document this, the stronger the case for a formal recall becomes. I have already filed complaints with the Tunisian Consumer Protection Agency and the Ministry of Commerce, sent a formal dispute notice to Mercedes-Benz AG Stuttgart, and built a full press file now being shared with automotive journalists internationally. If you know other owners affected, please direct them here. Every documented case counts.

 

That's true once symptoms started, you don't know the exact extent of the damage. I am not sure if you can file with the NHTSA. The main concern for the NHTSA is this central control valve mesh could cause engines to suddenly stall while driving, which could lead to a crash. It's a safety concern Mercedes needs to recall. I don't how many of this problem needs to be reported for them to start a recall. Anyone with a w206 that have higher miles than 60K and not have this issue?

 

You've just identified the most powerful angle in this entire case — safety.

You're absolutely right. Engine stall while driving due to sudden loss of camshaft adjustment is not just a mechanical inconvenience — it's a potential crash risk. Loss of power at highway speed, unexpected stalling in traffic, or during an overtake maneuver could have fatal consequences. This reframes the entire issue from a warranty dispute to a public safety concern.

Regarding the NHTSA: even if my vehicle is in Tunisia, anyone in the US with a W206 experiencing these symptoms CAN and SHOULD file a complaint at safercar.gov. The NHTSA tracks complaint volume — and when enough reports accumulate on the same fault codes on the same model, it triggers a formal investigation that can lead to a mandatory recall. You don't need to have had an accident — a stall or loss of power event qualifies.

For anyone reading this: if you own a W206 C180 or any M254-engined Mercedes and have experienced:
✔ Engine vibrations at low RPM
✔ Sudden loss of power
✔ Engine warning light
✔ Fault codes P001100, P001104, P001200, P001400, P001404, P001500

Please file a complaint at safercar.gov (US) or your national equivalent.

Mercedes-Benz AG has already internally documented this defect in bulletin LI05.20-P-080257 and released a redesigned replacement part. The question is no longer whether the defect exists — it's whether enough owners report it simultaneously to force a recall.

To your last question — I am actively trying to find W206 owners above 60K km without this issue. So far every owner I've reached who is in the affected production batch and has crossed 45–60K km has reported symptoms or confirmed failure. That pattern alone should alarm Mercedes.

 

Moderators should Sticky the post above, it's a very very serious issue for this car, actually the most important issue for the w206 on all the forums I will definitely be monitoring this situation.

 

Thank you — I genuinely appreciate the support and I agree completely.

This is not a minor inconvenience or an isolated case. This is a structural design defect documented by Mercedes-Benz AG themselves, affecting the M254 engine across ALL W206 model series, with confirmed failures across multiple continents. The safety implications — sudden engine stall while driving — make this a critical issue every W206 owner needs to be aware of before they cross the 40,000–60,000 km mark.

To the moderators: I formally request that this thread be stickied or pinned as a reference post for W206 owners. The information here — including the fault codes, the official Mercedes-Benz internal bulletin LI05.20-P-080257, and the documented cases worldwide — could save owners from unexpected breakdowns, costly repairs, and potential safety incidents.

For anyone following this thread: I am actively pursuing this case through multiple channels simultaneously — Mercedes-Benz AG Stuttgart, Mercedes Middle East, the Tunisian Ministry of Commerce, the Tunisian Consumer Protection Agency (ODC), the German Federal Motor Transport Authority (KBA), and the international automotive press. Every update will be posted here.

If you own a W206 with the M254 engine, please:
✔ Check your production date — pre-September 2022 vehicles are most at risk
✔ Monitor for early symptoms: vibrations at low RPM, rough idle, engine warning light
✔ Request a proactive diagnostic scan if you are approaching 40,000 km
✔ If still under warranty, specifically request the updated central valve with the optimized holding ring
✔ Document everything in writing

This thread stays open. Keep the reports coming.

 

I just watched some more videos on Chinese Tik Tok. They say it mostly happens on the M254.915 1.5T. engine. All the c300 engines in the US are the 2.0T M254.920. Maybe that’s why not many reported cases here. And no one on the forums have any issue. I also searched on cars.com and looked at carfax of cars over 100k miles and not see that they did the repair of the valve.

 

Well THAT'S a relief.

 

I mean wouldn't they use the same part for both engines as a way of cost cutting which Mercedes loves to do.

 

Since we are not seeing reports of problems with the 2.0 here in America and on this forum (and we would, as this is the place to post problems), I assume they don't.

 

I notice earlier in the thread it referenced all the 1.5T versions, and "early" M254 2.0T. Does that mean they fixed the problem/updated the failing part in later engine assemblies? Is there a year or VIN cut off? Finally, is this occurring only in engines produced in certain parts of the world? I'm in the U.S and my car was built in Germany, but I'm pretty sure the engine was built in Poland. They might not do a global recall if was only affecting Africa or Asian spec or assembled cars? I'm glad you posted about this, I will be following it. I was hoping the M254 was going to be more reliable than the M274 and M264 series motors.