C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Fuel leak when tank is full w204

Old Aug 25, 2018 | 12:20 PM
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C300
Fuel leak when tank is full w204

Hi all, I have a Mercedes c300 (2010) and the last month or so, whenever I fill up the tank the gas tank leaks fuel. When the tank is full and I park my car, there is a definite puddle from small drips of the gas tank. I realized this since the odor goes away after after the tank is only 3/4 full. I've also experimented filling only 3/4 full and no leak nor odor.

Around that same time when the fuel leak started, I got my oil changed at a 3rd party MB specialist and I believe think they put too much oil from the dip stick, but the "check oil level" message went away now after a month. Could this fuel leak be related to the higher than normal oil level?
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Old Aug 26, 2018 | 11:28 AM
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Originally Posted by Plutoe
and remember that having a full glove box does not have any bearing on the air pressure in the tires!
Thank you, that was my next question.
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Old Aug 26, 2018 | 03:17 PM
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Any chance the W204 is covered by the gas tank recall? My CLS550 and Charger were replaced for free.
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Old Aug 26, 2018 | 03:42 PM
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Originally Posted by 95viper
Any chance the W204 is covered by the gas tank recall? My CLS550 and Charger were replaced for free.
I was reading up on that and I believe they may have included the C-class for fuel tank under unlimited mileage for my year. I'll take it to the dealer and see what they have to say.

Last edited by Chastity; Aug 26, 2018 at 03:48 PM.
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Old Jan 7, 2020 | 09:22 AM
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Originally Posted by Chastity
I was reading up on that and I believe they may have included the C-class for fuel tank under unlimited mileage for my year. I'll take it to the dealer and see what they have to say.
was it covered? I have a C300 2010 and have the same problem... Thanks!
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Old Jan 7, 2020 | 12:59 PM
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Originally Posted by jorgevg73
was it covered? I have a C300 2010 and have the same problem... Thanks!
Haven't gotten around to it yet and have just been filling up to 4/5 full by calculating gas mileage traveled vs estimated mpg. Thanks for the reminder, still need to get this done.
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Old Jan 11, 2021 | 07:53 PM
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W221 S550 4MATIC
Originally Posted by Chastity
Hi all, I have a Mercedes c300 (2010) and the last month or so, whenever I fill up the tank the gas tank leaks fuel. When the tank is full and I park my car, there is a definite puddle from small drips of the gas tank. I realized this since the odor goes away after after the tank is only 3/4 full. I've also experimented filling only 3/4 full and no leak nor odor.

Around that same time when the fuel leak started, I got my oil changed at a 3rd party MB specialist and I believe think they put too much oil from the dip stick, but the "check oil level" message went away now after a month. Could this fuel leak be related to the higher than normal oil level?
You might fix it yourself.
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Old Jan 11, 2021 | 07:57 PM
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Finally took it to the dealer back in November 2020 and got it fixed under extended warranty.
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Old Jan 11, 2021 | 08:42 PM
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Fantastic video, Thank you.
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