Gas smell! Help!?
Thread Starter
Senior Member
Joined: Mar 2018
Posts: 494
Likes: 154
From: KY
2015 E63S Sedan, 2014 E550 Coupe, 2013 E350 Wagon
Gas smell! Help!?
My ‘14 E550 coupe now has 105k mi and is running well, however it has developed a persistent gasoline smell outside the car. I do notice it when entering and exiting the driver side, and after being garaged all night the smell is strong. However, no evidence on garage floor and no noticeable drop in mpg (yet). Please share any suggestions asap, as I have multiple 1k+ mi drives coming up in the next month.
I will note that on the last road trip, two unique events occurred, both slightly embarrassing. First, I almost ran out of gas in an apparent gas station desert btwn Baltimore and Cleveland. I’m stunned it didn’t sputter to the pump. Also, I did overfill the tank once due to lack of pump handle overflow function. I could see that causing lingering smell, but not for a week afterwards…? Also, filler on opposite side of car…of course gas maybe ran down some piece of car frame…
I have yet to get underneath it, and perhaps that will shed more light…thoughts??
I will note that on the last road trip, two unique events occurred, both slightly embarrassing. First, I almost ran out of gas in an apparent gas station desert btwn Baltimore and Cleveland. I’m stunned it didn’t sputter to the pump. Also, I did overfill the tank once due to lack of pump handle overflow function. I could see that causing lingering smell, but not for a week afterwards…? Also, filler on opposite side of car…of course gas maybe ran down some piece of car frame…
I have yet to get underneath it, and perhaps that will shed more light…thoughts??
Thread Starter
Senior Member
Joined: Mar 2018
Posts: 494
Likes: 154
From: KY
2015 E63S Sedan, 2014 E550 Coupe, 2013 E350 Wagon
Thanks Judge, appreciate the response! Have you had similar issue with your E400 coupe?
I’m certainly less inclined to tinker with fuel-related issues in general, just curious if symptoms sound familiar to anyone with similar model (m278, c207, etc). The fuel sender/dual fuel pump design I think these have looks complicated and therefore both expect and wrought with potential causal factors…
our local shops are also quite backed up currently
I’m certainly less inclined to tinker with fuel-related issues in general, just curious if symptoms sound familiar to anyone with similar model (m278, c207, etc). The fuel sender/dual fuel pump design I think these have looks complicated and therefore both expect and wrought with potential causal factors…
our local shops are also quite backed up currently
Super Member
Joined: Nov 2017
Posts: 669
Likes: 142
From: Hermosa Beach, California
2018 E400 Coupe
I haven't had any such problems with my E400, but I'm very familiar with the volatility and indeed explosiveness of gasoline. Not something for the average home mechanic to tackle.
Member
Joined: Sep 2019
Posts: 152
Likes: 48
From: Nashville, TN
'18 E400 Cab
Same here, never had the issue with my 2016 e400. If you can't find the source, don't drive it. If the smell is that strong I wouldn't even keep it in my garage. Very dangerous. On a fuel overflow, you may look to see if there's a puddle of gas slowly evaporating somewhere. Get a loaner or rental for your trips...
Thread Starter
Senior Member
Joined: Mar 2018
Posts: 494
Likes: 154
From: KY
2015 E63S Sedan, 2014 E550 Coupe, 2013 E350 Wagon
Evidence of leak after removing panel in front of driver side rear wheel
Gas on tank, clearly coming from top of tank
Bingo. Almost a pint surrounding fuel sender unit under backseat on driver side
Thread Starter
Senior Member
Joined: Mar 2018
Posts: 494
Likes: 154
From: KY
2015 E63S Sedan, 2014 E550 Coupe, 2013 E350 Wagon
Obtained replacement rubber o-ring from local dealer, off to pick up sender pump in the morning. Removing those lock rings is not much fun, agree with another post here that proper removal tool is essential
