E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Fuel leak on E220

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Old Aug 29, 2020 | 02:15 AM
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Waldo Boshoff's Avatar
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1996 W124 E220 Manual Transmission
Fuel leak on E220

My vehicle has this tendency to "leak fuel" which only happens when the vehicle has stayed parked from Monday - Friday (weekend driver), and also only at first start after the 5 days. It is quite a lot of fuel that spills out, to the extend that it leaves a trail behind the car for a few 100 meters. And then it stops, for the rest of the weekend there are no fuel leaks whatsoever. Sunday evening she gets parked again until the next weekend, and the cycle starts all over again.

Am I barking up the wrong tree in thinking that it could be the fuel tank vent valve, or can someone perhaps relate to this and give more accurate advice surrounding this exact issue?

any help will be greatly appreciated :-)

Thanks
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Old Sep 13, 2023 | 01:06 AM
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Martin Josiah's Avatar
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R229
Originally Posted by Waldo Boshoff
My vehicle has this tendency to "leak fuel" which only happens when the vehicle has stayed parked from Monday - Friday (weekend driver), and also only at first start after the 5 days. It is quite a lot of fuel that spills out, to the extend that it leaves a trail behind the car for a few 100 meters. And then it stops, for the rest of the weekend there are no fuel leaks whatsoever. Sunday evening she gets parked again until the next weekend, and the cycle starts all over again.

Am I barking up the wrong tree in thinking that it could be the fuel tank vent valve, or can someone perhaps relate to this and give more accurate advice surrounding this exact issue?

any help will be greatly appreciated :-)

Thanks
I have a 1998 SL500 with the exact same issue - possibly less fuel coming out on cold startup - but it may well get worse. Any ideas?
cheers
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