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Hello, My C200 Kompressor Petrol W204 2007 Sedan, Fuel smell in Cabin Help Cannot find it. It smells really bad most of the time, then it is not there at all. Had the injector seals replaced on the fuel injectors and the rail that feeds them.
Never smells when not running.
People can smell it from 30 meters away. Cant find the leak, cleaned everything looking for it. Two mechanics have looked everywhere.
Any advice on where to look ?
Did you have the car scanned with a Mercedes specific OBD scanner? Any fault codes that could point you in the right direction.
With the engine running does the gas smell seem to be coming from in the engine bay? Not the gas tank under the rear seat? Not under the car from the fuel line?
You may not see a liquid gas leak, could be just the vapors. Like leaving a gas container open in a shed and it stinks of gas.
Usually a leak in the purge/evap system would show a fault code, purge valve, charcoal canister, even gas cap.
Could use the scanner to check fuel pressures. Im not familiar with the compressor engine, may be a low and a high fuel pressure.
Can always try a UV dye to try and detect the fuel leak. But if you do I recommend using a UV light and look all around the engine bay first to see what it looks like in there. I used a dye in my engine oil only to realize the oil I use glows green on its own nevermind with a dye in it, so for me it was useless.
HI Tim,
Thankyou for your detailed reply.
Fuel smell only when engine is running, found a leak in the injector gasket and had all injectors seals replaced and the seals to the injection rail.
Smell is not always there. if parked level over night there is no smell. When aprked facing up the hill there is a string smell right away. there is no visible leak or stains.
Thanks for the suggestion of the fuel dye, i will try that for sure.
Kindest Regards,
Karl
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