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WaltNewman

Problems with Mercedes Citan 2018: Black smoke, engine indicator light and possible fault with the fuel pressure regulator

Poor fuel economy

Loss of engine power

Stalling while idling

Jerking on acceleration

Check engine light on

Engine shuts off by itself

Strong exhaust smell

Unsteady engine

Black smoke from exhaust on acceleration

Hey guys, I'm having problems with my 2018 gasoline Mercedes Citan. It smokes black when accelerating, the check engine light is on, the engine stalls by itself, loss of power, rough engine running, jerking when accelerating, poor fuel economy, strong exhaust smell and stalling at idle. I suspect that the fault may lie with the fuel pressure regulator. Has anyone had similar experiences and can give tips on how to solve the problem? I'm particularly interested in how you solved this in the workshop. Appreciate any help!

(Translated from German)

4 comment(s)


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.

(Translated from German)

WaltNewman (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!

(Translated from German)

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!

(Translated from German)

WaltNewman (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!

(Translated from German)

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