Mercedes S-Class Diesel (2017) with swirl flap defect: Unsteady engine, loss of power and black smoke

Hey, I feel you. Had a similar problem with my 2014 Mercedes E-Class diesel some time ago. Ran anything but smooth, exactly as you described: stuttering, rough, black smoke. Really annoying. Well, I took a chance and went to the mechanic. After a bit of poking around, they found that the swirl flap was broken. Apparently it's in the intake manifold and if it breaks, it can cost a lot of money. It was quite a job to replace it because the whole intake manifold had to be removed. But according to the guys at the garage, it worked and my car ran like clockwork again. It was a serious matter, so I can only advise you to tackle it quickly before anything else breaks. But don't worry, your car should run smoothly again afterwards. Good luck, buddy!

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Hey, thanks for the quick response. It seems like you went through exactly what I'm facing now. I'd be interested to know what costs you incurred when you solved this swirl flap problem. Do you still have a rough idea? And have you had any similar problems since then, or did everything go smoothly after the repair? Looking forward to your reply, buddy!

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Hey, no problem! Roughly speaking, the fun cost me about €865 at the time. To be honest, it was quite a shock, but what can you do, right? The main thing is that the car runs again. Since the visit to the mechanic, the problem with the swirl flaps has also been completely resolved and my Mercedes is finally running as it should again, without stuttering and smoke. I haven't had any similar problems since. So yes, everything went smoothly after the repair, fortunately. Hope this helps you and you get yours running again too! Good luck with that, buddy!

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Hey, that's a real help! Sure, the price hurts at first, but if the car runs again afterwards, that's probably the most important thing. I'm really glad you didn't have another problem afterwards. Thanks for sharing your experience, I now have a better feeling when I go to the mechanic. Let's hope it goes the same for me. Thanks again, buddy!

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Got error message 207860 : 2078 - [2] Component B28 / 14 (Particle filter differential pressure sensor) is not working properly. I got a short circuit to ground on my w209 220 but there is no black smoke or anything like that the only thing that occurs is that the check engine light comes on and I don't have full power but there is no stuttering at idle or anything like that.

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The error code you're seeing is related to the Diesel Particulate Filter (DPF) pressure sensor. This sensor monitors the pressure difference across the DPF, which helps to indicate its efficiency. If the sensor is faulty or there's a short circuit, it can cause a loss of power and trigger the check engine light, as the engine control unit can't accurately determine the DPF's condition. You can start by checking the wiring and connectors leading to the DPF pressure sensor for any visible damage or loose connections. If everything looks fine, the sensor itself might be faulty and may need to be replaced. Remember, this is just a starting point for troubleshooting. If you're not comfortable doing this yourself, I'd recommend taking your car to a professional mechanic. Please let us know how you get on with these checks, or if you have any other questions.

All well and (probably) good. But I drive a 200 compressor and have the same error message. Does anyone have any ideas?

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The error message you're seeing is also related to a pressure sensor, but in your case, it's likely related to the supercharger (compressor) system, given your car model. This could be due to a faulty sensor, wiring issues, or a mechanical problem with the supercharger itself. Start by inspecting the wiring and connectors to the supercharger pressure sensor for any visible damage or loose connections. If everything looks fine, the sensor itself might be faulty and may need to be replaced. If you're not comfortable doing this yourself, I'd recommend taking your car to a professional mechanic. Please let us know how you get on with these checks, or if you have any other questions.

Hello Günter, What error code did you save for your vehicle? Have you noticed any symptoms while driving that could help you narrow down the fault?

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