2019 E63S Wagon Fuel leak - ideas?
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Senior Member
Joined: Jan 2007
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2006 E55 Wagon (RIP), 2019 E63S Wagon (Sold) 2023 AMG GT634S
2019 E63S Wagon Fuel leak - ideas?
Ok - hive mind - I have a call into my service advisor but in the meantime....
Drove car late Friday night / early Saturday AM. Came home parked in garage. Saturday morning- didn't notice anything weird. Let home in a different vehicle 10 AM-ish. Came home @ 6PM parked in garage and didn't initially notice anything (aside - other vehicle is a diesel truck so may have masked some smell?). Went to go to dinner around 8-ish, walking into the garage and there was a HUGE gas smell. Further investigation - there was a LEAK and some puddling under the car (rear engine, center) and had enough volume to run to the side. Probably 1-2 paper towels.
Checked gas cap - didn't feel like huge pressure release or anything odd. Tank level 3/8 or so. Cleaned up - have not drive car - no further leaks.
Makes no sense that I didn't notice any smell Saturday AM - and the garage was closed all night long. NO ONE has driven the car - there's just 2 of us here and the dogs are either not smart enough or blind.
ASIDE - had a low coolant indicator last week - added - and checked after driving (put a tape mark on the tank) and that SEEMS to be stable - but have not driven all that much - especially since the above!)
Ideas?
Car lives an easy life. Current on service. 10K ish miles.
Drove car late Friday night / early Saturday AM. Came home parked in garage. Saturday morning- didn't notice anything weird. Let home in a different vehicle 10 AM-ish. Came home @ 6PM parked in garage and didn't initially notice anything (aside - other vehicle is a diesel truck so may have masked some smell?). Went to go to dinner around 8-ish, walking into the garage and there was a HUGE gas smell. Further investigation - there was a LEAK and some puddling under the car (rear engine, center) and had enough volume to run to the side. Probably 1-2 paper towels.
Checked gas cap - didn't feel like huge pressure release or anything odd. Tank level 3/8 or so. Cleaned up - have not drive car - no further leaks.
Makes no sense that I didn't notice any smell Saturday AM - and the garage was closed all night long. NO ONE has driven the car - there's just 2 of us here and the dogs are either not smart enough or blind.
ASIDE - had a low coolant indicator last week - added - and checked after driving (put a tape mark on the tank) and that SEEMS to be stable - but have not driven all that much - especially since the above!)
Ideas?
Car lives an easy life. Current on service. 10K ish miles.
Thread Starter
Senior Member
Joined: Jan 2007
Posts: 361
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2006 E55 Wagon (RIP), 2019 E63S Wagon (Sold) 2023 AMG GT634S
They have not been able to recreate the problem, so I am picking it up today. Not sure how I feel about that - it shouldn't have happened at all, but it also shouldn't be an anomaly. Now, it will take a while for me to trust the car. :-( I'll post what they tried - but other than running it and sitting or driving it and sitting, not sure what else one could so to simulate the conditions that led to it previously.
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From: Toronto, Ont, Canda
go fast grocery getter wagon
https://mbworld.org/forums/s-class-w...ispreloading=1
although the link is for a S class, but the mechanical aspect of this fuel hose could be very similar to most mb models perhaps. I also have something of similar issue, esp. in winter months but the dealer could not find any fuel leakage anywhere and they simply told me to monitor the situation.
although the link is for a S class, but the mechanical aspect of this fuel hose could be very similar to most mb models perhaps. I also have something of similar issue, esp. in winter months but the dealer could not find any fuel leakage anywhere and they simply told me to monitor the situation.
Out Of Control!!
Joined: Sep 2018
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From: unbegrenzt
2017 GLE350 4MATIC
If it happens again start documenting according to your state’s lemon law. Inform the dealer of the lemon documentation.
Leak sources from other vehicles posted on this site: fuel pump mounting flange on tank under rear seat and fuel line connection at either low side or high side of high pressure pump.
You need to do the dealer’s job for them and be able to demonstrate the problem repeatably on demand.
Leak sources from other vehicles posted on this site: fuel pump mounting flange on tank under rear seat and fuel line connection at either low side or high side of high pressure pump.
You need to do the dealer’s job for them and be able to demonstrate the problem repeatably on demand.
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Thread Starter
Senior Member
Joined: Jan 2007
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2006 E55 Wagon (RIP), 2019 E63S Wagon (Sold) 2023 AMG GT634S
Not sure about the pressure testing of the lines. They dropped the pan and inspected everything per the service bulletin that says they could "weep" at the seals. No evidence found. No odor either. The ran it and let it sit. Nothing. They drove it "spiritedly" as I had the evening before the event, and let it sit. Nothing. I drove it back home from dealer and put in the garage. Nothing.
I have it on record of the incident occurring once and will be on the lookout for it again.
Seems impossible that this will be a single occurrence.
Thanks for the links - will also check out. Leak was definitely at center rear of engine if I see the originating puddle.
For the weeping issue (S Class) - tech and service advisor were aware of the cold start / gas smell / weeping issue and looked for that - we discussed that when I picked up the car. However, with no gas smell and this not being a cold start issue - they ruled it out after inspection. My SA is great - he was an AMG tech and worked on my prior 2006 E55 - we've been "together" since 2007 at the same dealer - so I never have to worry that I am not being taken seriously or taken care of.
So - we wait.
I have it on record of the incident occurring once and will be on the lookout for it again.
Seems impossible that this will be a single occurrence.
Thanks for the links - will also check out. Leak was definitely at center rear of engine if I see the originating puddle.
For the weeping issue (S Class) - tech and service advisor were aware of the cold start / gas smell / weeping issue and looked for that - we discussed that when I picked up the car. However, with no gas smell and this not being a cold start issue - they ruled it out after inspection. My SA is great - he was an AMG tech and worked on my prior 2006 E55 - we've been "together" since 2007 at the same dealer - so I never have to worry that I am not being taken seriously or taken care of.
So - we wait.
Last edited by Uber Wagon; May 1, 2022 at 01:53 PM. Reason: More info
Out Of Control!!
Joined: Sep 2018
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From: unbegrenzt
2017 GLE350 4MATIC
From memory it seems like W205 C-Class with M274 owners also reported underhood fuel smells/leaks. If you have narrowed the source to underhood, there aren't many possibilities:
- fuel injector
- high pressure circuit (lines, rail)
- high pressure pump
- low pressure circuit (lines)
Try pulling the engine cover off and spend some time with a bright LED flashlight closely inspecting the rear of the engine as close to the high pressure pump as you can get.
- fuel injector
- high pressure circuit (lines, rail)
- high pressure pump
- low pressure circuit (lines)
Try pulling the engine cover off and spend some time with a bright LED flashlight closely inspecting the rear of the engine as close to the high pressure pump as you can get.
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Joined: Jul 2013
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From: Toronto, Ont, Canda
go fast grocery getter wagon
My issue was recent ( started around January 2022). It only happened in cold start (morning only) in ambient temperature of 0 degree Celsius or lower. The gas odour will persist in the cabin for around 10+ km of driving while the car was slowly coming to typical operating temperature and it will then go away and never to be reoccurred for the rest of the day.
The dealer said they were unable to pull any codes as no fault messages were lit up. Very puzzling for my case.
The dealer said they were unable to pull any codes as no fault messages were lit up. Very puzzling for my case.
Thread Starter
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Joined: Jan 2007
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2006 E55 Wagon (RIP), 2019 E63S Wagon (Sold) 2023 AMG GT634S
weeeeelllllllllll.......... (hangs head in shame)
So - opened the back of the truck and saw a huge spill staining the bedliner. Also noticed the pattern under the car from the condensate from the A/C. Super Sleuth (me) put 2+2 together and determined that..... when we came home Saturday afternoon, the spill occurred in the pickup bed. (didn't "see" it because of a bedcover). Put truck in garage and didn't notice smell since it was not consuming the garage yet. However, after closing up the garage for a couple hours (and heating it up from the Cummins) it REAKED.
Then - seeing the puddle by the passenger door of the car, and soaking it up and sniffing it - it SMELLED TERRIBLE. Of course the whole damn garage would have exploded if I lit a match so not sure I could have smelled anything other than gas. I blamed poor Otto.
Sheepishly calling service advisor....
On a positive front - car seems to be running / responding better so maybe worthwhile?
D'oh!
Good news is that car is fine.
So - opened the back of the truck and saw a huge spill staining the bedliner. Also noticed the pattern under the car from the condensate from the A/C. Super Sleuth (me) put 2+2 together and determined that..... when we came home Saturday afternoon, the spill occurred in the pickup bed. (didn't "see" it because of a bedcover). Put truck in garage and didn't notice smell since it was not consuming the garage yet. However, after closing up the garage for a couple hours (and heating it up from the Cummins) it REAKED.
Then - seeing the puddle by the passenger door of the car, and soaking it up and sniffing it - it SMELLED TERRIBLE. Of course the whole damn garage would have exploded if I lit a match so not sure I could have smelled anything other than gas. I blamed poor Otto.
Sheepishly calling service advisor....
On a positive front - car seems to be running / responding better so maybe worthwhile?
D'oh!
Good news is that car is fine.
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2018 E63S Wagon
MBWorld Fanatic!
Joined: Jul 2013
Posts: 2,591
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From: Toronto, Ont, Canda
go fast grocery getter wagon
^^
Mine was eventually fixed. dealer replaced the fuel line as they found there was a tiny leakage (coming from a plastic part within a section of the line (so I was told)). So, better ask your dealer to do a full inspection of the fuel line.
Mine was eventually fixed. dealer replaced the fuel line as they found there was a tiny leakage (coming from a plastic part within a section of the line (so I was told)). So, better ask your dealer to do a full inspection of the fuel line.
Last edited by bobblehead; Nov 29, 2023 at 10:04 AM.
