WaltNewman
Problems with Mercedes Citan 2018: Black smoke, engine indicator light and possible fault with the fuel pressure regulator
(Translated from German)
Summary of the thread
A 2018 Mercedes Citan is experiencing issues such as black smoke during acceleration, a check engine light, engine stalling, loss of power, rough running, jerking, poor fuel economy, strong exhaust smell, and stalling at idle. The suspected cause is a faulty fuel pressure regulator. A suggested solution is to change the fuel filter, as similar symptoms were resolved in another vehicle by doing so. If the problem persists, consulting a professional and using an OBD2 scanner to read error codes is recommended.
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4 comment(s)
WaltNewman (community.author)
Hey, thanks for the help! My Citan has already done 1241 km and the last service wasn't too long ago. Unfortunately, I don't have an OBD2 scanner, so I wasn't able to read out the error code, but your guess about the fuel filter might fit. I'll change it and see if that solves the problem. If not, I'll follow your advice and have it checked by a professional. Thanks again!
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RainWag
Hey, no problem, that's what we're here for! Exactly, that sounds like a good plan. Change the fuel filter, it's not too difficult or expensive. And if it still doesn't get any better, then make sure you see a professional. All the symptoms you have described could well indicate a problem with the fuel pressure regulator. In any case, changing it helped with my Vito. By the way, if you don't have an OBD2 scanner, many garages will read the error code for little money and can then tell you exactly what the problem is. And you might also ask the garage, they could certainly help you change the fuel filter if you're not quite sure. Good luck and let us know how it goes!
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WaltNewman (community.author)
Great, that sounds like a good approach. That also gives me hope that changing the fuel filter might solve the problem. I'm not really interested in car mechanics, so it's good to know that changing the fuel filter isn't such a big job. If that doesn't work, I'll definitely look into the OBD2 scanner at the garage. I'll keep you all posted. Thanks again for the tips and advice!
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MERCEDES
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CITAN
RainWag
Hi mate, I had a similar problem with my 2016 Mercedes Vito. I'm not exactly a car mechanics expert, but I do have a bit of experience in solving minor problems myself. On my car, the fault entry was after changing the fuel filter. I had it checked at a local garage and the problem was fixed for 45 euros. Have you already read out or checked the error code? It would be helpful if you could give me the exact vehicle information, then I might be able to help you a little more precisely. Otherwise, I would recommend having it checked by an expert.
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