Gas smell in passenger rear... not gas tank... weird
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Joined: Oct 2014
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2016 E63s Wagon - CCB & CF package
Gas smell in passenger rear... not gas tank... weird
2005 E55 AMG, stock car with about 75K miles.
Recent history - I had the entire tank and the pumps replaced under MB warranty about 6 months ago. I doubled-checked the pumps and they are new and bone dry so no concerns there.
It was fairly warm a few days ago and i noticed a very strong gas odor. It was coming from the rear passenger wheel well. It was so strong that i couldn't keep the windows open as it was burning my eyes. I had to close the windows and run the AC to keep it out.
Living in the crazy northeast, the 80*F was short-lived and its been about 40*F last 2 days. No smell at all since the weather cooled off.
I did have a CEL light up 2 weeks ago on a warm 60*F day, P0456 "small evap leak" as well as P0505 "idle air control system". I reset them and its been 300 miles since and nothing.
I have to assume that the recent smell is related to the codes I saw a few weeks back. Oddly enough, no smell when the CEL was on and no CEL when this strong gas odor was present.
I priced up the purge valve, charcoal canister and shut-off valve which are nearly $500. Any ideas which it may be? I want to go buy them all when 2 are most likely unnecessary.
Thank you!
Recent history - I had the entire tank and the pumps replaced under MB warranty about 6 months ago. I doubled-checked the pumps and they are new and bone dry so no concerns there.
It was fairly warm a few days ago and i noticed a very strong gas odor. It was coming from the rear passenger wheel well. It was so strong that i couldn't keep the windows open as it was burning my eyes. I had to close the windows and run the AC to keep it out.
Living in the crazy northeast, the 80*F was short-lived and its been about 40*F last 2 days. No smell at all since the weather cooled off.
I did have a CEL light up 2 weeks ago on a warm 60*F day, P0456 "small evap leak" as well as P0505 "idle air control system". I reset them and its been 300 miles since and nothing.
I have to assume that the recent smell is related to the codes I saw a few weeks back. Oddly enough, no smell when the CEL was on and no CEL when this strong gas odor was present.
I priced up the purge valve, charcoal canister and shut-off valve which are nearly $500. Any ideas which it may be? I want to go buy them all when 2 are most likely unnecessary.
Thank you!
Last edited by V-AMG; Mar 27, 2017 at 10:31 AM.
Thread Starter
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Joined: Oct 2014
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2016 E63s Wagon - CCB & CF package
I try to help people here as much as I can, so i come back here for help myself.
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Joined: Aug 2015
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From: East Coast, USA
Mercedes CLS 55 AMG
2005 E55 AMG, stock car with about 75K miles.
Recent history - I had the entire tank and the pumps replaced under MB warranty about 6 months ago. I doubled-checked the pumps and they are new and bone dry so no concerns there.
It was fairly warm a few days ago and i noticed a very strong gas odor. It was coming from the rear passenger wheel well. It was so strong that i couldn't keep the windows open as it was burning my eyes. I had to close the windows and run the AC to keep it out.
Living in the crazy northeast, the 80*F was short-lived and its been about 40*F last 2 days. No smell at all since the weather cooled off.
I did have a CEL light up 2 weeks ago on a warm 60*F day, P0456 "small evap leak" as well as P0505 "idle air control system". I reset them and its been 300 miles since and nothing.
I have to assume that the recent smell is related to the codes I saw a few weeks back. Oddly enough, no smell when the CEL was on and no CEL when this strong gas odor was present.
I priced up the purge valve, charcoal canister and shut-off valve which are nearly $500. Any ideas which it may be? I want to go buy them all when 2 are most likely unnecessary.
Thank you!
Recent history - I had the entire tank and the pumps replaced under MB warranty about 6 months ago. I doubled-checked the pumps and they are new and bone dry so no concerns there.
It was fairly warm a few days ago and i noticed a very strong gas odor. It was coming from the rear passenger wheel well. It was so strong that i couldn't keep the windows open as it was burning my eyes. I had to close the windows and run the AC to keep it out.
Living in the crazy northeast, the 80*F was short-lived and its been about 40*F last 2 days. No smell at all since the weather cooled off.
I did have a CEL light up 2 weeks ago on a warm 60*F day, P0456 "small evap leak" as well as P0505 "idle air control system". I reset them and its been 300 miles since and nothing.
I have to assume that the recent smell is related to the codes I saw a few weeks back. Oddly enough, no smell when the CEL was on and no CEL when this strong gas odor was present.
I priced up the purge valve, charcoal canister and shut-off valve which are nearly $500. Any ideas which it may be? I want to go buy them all when 2 are most likely unnecessary.
Thank you!
P0456 is indicative of the gas cap leaking, almost exclusively. The CEL turns on for that code during the vacuum test of the gas tank when the cap seal fails, and if you fill your car regularly when it hits a 1/2 tank and open your cap during the middle of the test it will trigger regardless of whether there's an actual fault or not.
I notice you never mentioned ever replacing your cap. I would start by doing that. I would also like to know how full your tank was on this 80 degree day.
Thread Starter
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Joined: Oct 2014
Posts: 505
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2016 E63s Wagon - CCB & CF package
P0456 is indicative of the gas cap leaking, almost exclusively. The CEL turns on for that code during the vacuum test of the gas tank when the cap seal fails, and if you fill your car regularly when it hits a 1/2 tank and open your cap during the middle of the test it will trigger regardless of whether there's an actual fault or not.
I notice you never mentioned ever replacing your cap. I would start by doing that. I would also like to know how full your tank was on this 80 degree day.
I notice you never mentioned ever replacing your cap. I would start by doing that. I would also like to know how full your tank was on this 80 degree day.
My tank was right around half. I started with almost a full tank that day, drove about 150 miles and was at about half when i got caught in traffic and the smell started. I sat in traffic for the next 2 hours with small stops to the restroom and for coffee during it. It smelled for the duration.
I smelled around the cap too and even though i smelled it, i just assumed it was coming up from the wheel well, because when i smelled around the wheel well, it was POTENT. I was getting light-headed as i stopped a few times to smell it and see what was going on.
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From: Dublin,OH. Ft Myers, FLA
E63 AMG 2007
Super Member
Joined: Jan 2016
Posts: 599
Likes: 120
2004 E55
2005 E55 AMG, stock car with about 75K miles.
Recent history - I had the entire tank and the pumps replaced under MB warranty about 6 months ago. I doubled-checked the pumps and they are new and bone dry so no concerns there.
It was fairly warm a few days ago and i noticed a very strong gas odor. It was coming from the rear passenger wheel well. It was so strong that i couldn't keep the windows open as it was burning my eyes. I had to close the windows and run the AC to keep it out.
Living in the crazy northeast, the 80*F was short-lived and its been about 40*F last 2 days. No smell at all since the weather cooled off.
I did have a CEL light up 2 weeks ago on a warm 60*F day, P0456 "small evap leak" as well as P0505 "idle air control system". I reset them and its been 300 miles since and nothing.
I have to assume that the recent smell is related to the codes I saw a few weeks back. Oddly enough, no smell when the CEL was on and no CEL when this strong gas odor was present.
I priced up the purge valve, charcoal canister and shut-off valve which are nearly $500. Any ideas which it may be? I want to go buy them all when 2 are most likely unnecessary.
Thank you!
Recent history - I had the entire tank and the pumps replaced under MB warranty about 6 months ago. I doubled-checked the pumps and they are new and bone dry so no concerns there.
It was fairly warm a few days ago and i noticed a very strong gas odor. It was coming from the rear passenger wheel well. It was so strong that i couldn't keep the windows open as it was burning my eyes. I had to close the windows and run the AC to keep it out.
Living in the crazy northeast, the 80*F was short-lived and its been about 40*F last 2 days. No smell at all since the weather cooled off.
I did have a CEL light up 2 weeks ago on a warm 60*F day, P0456 "small evap leak" as well as P0505 "idle air control system". I reset them and its been 300 miles since and nothing.
I have to assume that the recent smell is related to the codes I saw a few weeks back. Oddly enough, no smell when the CEL was on and no CEL when this strong gas odor was present.
I priced up the purge valve, charcoal canister and shut-off valve which are nearly $500. Any ideas which it may be? I want to go buy them all when 2 are most likely unnecessary.
Thank you!
Sounds like you have a vacuum leak more than likely related to the hose off the back of the supercharger... hard metal pipe that leads to the purge valve located behind the drivers side head light.
Check that line then report back before chucking money down a hole
You need to remove the surge tank to see if the metal pipe is inserted in the back of the supercharger
Honestly lots of this going on lately just search "p0505 solved" my p0456 was the hose behind the head light though
Thread Starter
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Joined: Oct 2014
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2016 E63s Wagon - CCB & CF package
Have you taken your drivers valve cover off lately???
Sounds like you have a vacuum leak more than likely related to the hose off the back of the supercharger... hard metal pipe that leads to the purge valve located behind the drivers side head light.
Check that line then report back before chucking money down a hole
You need to remove the surge tank to see if the metal pipe is inserted in the back of the supercharger
Honestly lots of this going on lately just search "p0505 solved" my p0456 was the hose behind the head light though
Sounds like you have a vacuum leak more than likely related to the hose off the back of the supercharger... hard metal pipe that leads to the purge valve located behind the drivers side head light.
Check that line then report back before chucking money down a hole
You need to remove the surge tank to see if the metal pipe is inserted in the back of the supercharger
Honestly lots of this going on lately just search "p0505 solved" my p0456 was the hose behind the head light though
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Super Member
Joined: Jan 2016
Posts: 599
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2004 E55
So there is a pressure sensor inside the tank, do you think it is possible the tank is not sealing all the way or that when the remove install happened of the tank it is possible they boogered something up while doing the work...?
I mean with the warranty I would just slap it right back to that dealer that did the work and tell them you smell gas again
When I had my p0456 it was right after they did my tank and they did and found that hose loose behind the head light. If its a gas smell I would take it back... maybe the hose from the gas fill point down into the tank.
Can you triage a little more with your sniffer and find the source? inside outside etc..?
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Thread Starter
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Joined: Oct 2014
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2016 E63s Wagon - CCB & CF package
Got my SDS out of storage and did a little more investigating today. I ran the fuel tank pressure test with SDS and results werent the best, looks like it failed by just a hair.
Allowed vacuum pressure loss within 60 seconds is 5.0 hPa and i lost 5.1 hPa. Not too bad but it was above the threshold. See attached photo.
What are your guys' thoughts? Could this be due to a gas cap or should i take it back to the dealer who did my tank?
[img]webkit-fake-url://34daf466-33f4-4e22-b87c-11a60bab81b0/imagejpeg[/img]
Last edited by V-AMG; Apr 1, 2017 at 05:47 PM.
Thread Starter
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Joined: Oct 2014
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2016 E63s Wagon - CCB & CF package
i assume that it cant be a major leak or crack since it hasnt been smelling at all and it help almsot enough vacuum according to MB specs
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From: Florida
A Merc
http://www.benzworld.org/forums/w210...1359651?page=1
I think this is the part number
2114700159
Changed mine a while back
Lost my pics though
I think this is the part number
2114700159
Changed mine a while back
Lost my pics though
Thread Starter
Super Member
Joined: Oct 2014
Posts: 505
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2016 E63s Wagon - CCB & CF package
http://www.benzworld.org/forums/w210...1359651?page=1
I think this is the part number
2114700159
Changed mine a while back
Lost my pics though
I think this is the part number
2114700159
Changed mine a while back
Lost my pics though
MBWorld Fanatic!
Joined: Dec 2011
Posts: 4,599
Likes: 102
From: Florida
A Merc
Was getting the same codes so I changed the purge valve in the front because it was easier to change and cheaper. Then got the code a few days later again so I knew it was the other valve since my tank and pumps were changed.
It's for emmisions and eliminate extra fuel vapor.
It's for emmisions and eliminate extra fuel vapor.
Thread Starter
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Joined: Oct 2014
Posts: 505
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2016 E63s Wagon - CCB & CF package
Was getting the same codes so I changed the purge valve in the front because it was easier to change and cheaper. Then got the code a few days later again so I knew it was the other valve since my tank and pumps were changed.
It's for emmisions and eliminate extra fuel vapor.
It's for emmisions and eliminate extra fuel vapor.
