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Any ideas? I drive the car (1996 S320) and I smell gas. Not just when I fill up. It occurs whether tank is full, or empty. There is a strong odor of gas in the passenger compartment of the car, most of the time. This is a strange phenomenon, because perhaps 10% of the time there is no smell of gas, but most times, the smell of gas is present. I appreciate any ideas on what this might be, and how I can rectify the situation. Thanks.
 

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Any ideas? I drive the car (1996 S320) and I smell gas. Not just when I fill up. It occurs whether tank is full, or empty. There is a strong odor of gas in the passenger compartment of the car, most of the time. This is a strange phenomenon, because perhaps 10% of the time there is no smell of gas, but most times, the smell of gas is present. I appreciate any ideas on what this might be, and how I can rectify the situation. Thanks.
Have you checked the fuel pipes underneath the car? Also the pipes arund the fuel pump? These regularly corrode. Also check the rubber pipes around the tank and pump/filter assembly. If you put the hood up do you smell petrol?

cheers

Dave
 

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Hi OCMD if - as per your PM you're not smelling gas under the hood, check out the fuel pipes underneath the car and perhaps the fuel fill neck on the tank

I had similar issues with a £400 1993 S500 I bought: the pipes were so corroded that they crumbled to nothing (pouring petrol everywhere) when I touched them. I just replaced them with 8mm plastic-coated copper pipe as used in LPG installations

cheers

Dave
 

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Discussion Starter #4
Thanks Dave. All it was was a ruptured fuel line underneath, I believe coming out of the fuel pump because it was spraying fuel everywhere after I started it up (stuck key issue which took awhile to resolve which was fixed by jerking the steering wheel while car was secured at my job locale so I didn't bother much with the issue until I had some time!) - Ahh the benefits of a work car with free gas and sirens!

My local independent (superb, by the way, did the repair for about 200 bucks if I recall) handled the repair efficiently and properly, for a fair price.

By the way, if in Maryland anywhere near the brand new Montgomery County Intercounty Connector (which connects 270 and I-95) this place is less than 2 minutes from the New Hampshire Avenue exit and provides excellent, knowledgeable service. I am pleased they were recommended to me and now I recommend them to you in Maryland, USA!

Mercedes-Benz Repair Specialists | Silver Spring, MD | PULLIAM ENGINEERING

Beats the hell out of a stealership!
 

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Your thread reminded me of the first day with my coupe; I bought it from an exhasperated PO that had just had an engine harness installed and then was greeted by the dreaded no crank starter lockout problem. A 20A fuse and I was driving it home for $2500 ( I kept the blown fuse...it's in my toolbox). When I got it home I was walking around it admiring it when I smelled gas. Turned out the fuel pump itself was leaking. So began the love affair with what is now my favorite car ever owned.
 

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Glad the problem was located! :D

While we on the subject... Is it normal to smell gas in the cabin straight after a re-filling the tank? It seems to linger for 15 sec or so then goes away completely untill the next top up.. I guess since the tank is located in the trunk, it does make sense.. The question is< does it also happen to you guys?
 

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Glad the problem was located! :D

While we on the subject... Is it normal to smell gas in the cabin straight after a re-filling the tank? It seems to linger for 15 sec or so then goes away completely untill the next top up.. I guess since the tank is located in the trunk, it does make sense.. The question is< does it also happen to you guys?
Maybe you spilt petrol on your shoes :)
 

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:big laugh:
Maybe you spilt petrol on your shoes
:big laugh::big laugh:


Not a chance comrade!

We NEVER fill our own tanks here in South Africa. At EVERY petrol station we have "Petrol Attendants" who you instruct how much to fill.. It is their job, and they get paid monthy salaries. They can also pump your tires, fill radiator water, engine oil, clean windscreen, help women with changing tires, lol...

So nope, thats not it comrade..
 

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guys i got w140 320 1998 there is burnt fuel smell in the cabin and exhaust. I have changed air flow sensor, fuel filter as well. But the smell does not go and time to time eyes are burnt as well? is that of catalytic converter isnt working properly or what? I need your kind advice.
 

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If it hurts your eyes it sounds rich.Maf,comes to mind,check all vacuum lines first,the one that goes under sparkplug cover likes to break into,The fuel regeneration valve on the drivers side fender area can stick open.You can clean it with carb spray.I always let my engine run,and remove oil cap,the change in idle will let you know you have vacuum.If it does not change you have a leak.If over 150,000 miles I changed my oxygen sensor.The device that closes the trunk also will let gases in the car.
 

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Discussion Starter #11
Funny. I just received this notice of a new post on this very old thread. All I can say is how happy I was to have been able to sell my 1996 S 320 a few years ago! No more nickel and diming (actually 400 and 500 dollaring) me to death. I was able to sell it to a guy who did my original refreshing work on it when I bought it. He said that he loved this series Benz, it was a tank to protect his family, and if I ever wanted to sell it? Call him. He flew up from Texas a few years ago, handed over 7500 cash, I picked him up in the Benz, he dropped me off at my house in Maryland, and drove to his house in Texas, over a thousand miles away! When I last checked, the tank was still running, full speed ahead. At least he was a mechanic so he could keep ahead of all the annoying things that go wrong with this car. Long story short? I will never own another Benz again, even though I loved this one, when it was running! Oh, to have my 1990 BMW 535i back again.......never had one issue with that car!
 

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Any ideas? I drive the car (1996 S320) and I smell gas. Not just when I fill up. It occurs whether tank is full, or empty. There is a strong odor of gas in the passenger compartment of the car, most of the time. This is a strange phenomenon, because perhaps 10% of the time there is no smell of gas, but most times, the smell of gas is present. I appreciate any ideas on what this might be, and how I can rectify the situation. Thanks.
May I recommend an advanced technical procedure?

Making an advanced technical emission exchange on the engine system can work. This involves updating the financial communications with certain vendors so that the 6 is sold and V12 is bought instead...

It's a sign :grin :grin :grin

Not trying to be a smart ass, but just thought it was funny...
 

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If it hurts your eyes it sounds rich.Maf,comes to mind,check all vacuum lines first,the one that goes under sparkplug cover likes to break into,The fuel regeneration valve on the drivers side fender area can stick open.You can clean it with carb spray.I always let my engine run,and remove oil cap,the change in idle will let you know you have vacuum.If it does not change you have a leak.If over 150,000 miles I changed my oxygen sensor.The device that closes the trunk also will let gases in the car.
thanks Nathan i really appreciate it, i will go through what you have told. i got 418k km on my 98. I think need to get the oxygen sensor replaced. one more thing i didn't get the device you talking about is air vacuum pump beneath the seat.
i have checked sparkplugs and fuel pressure damper as well. Now need to go through what you have instructed.
do you think the catalytic converter doesnt need to be replaced? I am residing in dubai and parts are not expensive to get. Over here is big ass used mercedes part market can procure whatever is required.
 

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thanks Nathan i really appreciate it, i will go through what you have told. i got 418k km on my 98. I think need to get the oxygen sensor replaced. one more thing i didn't get the device you talking about is air vacuum pump beneath the seat.
i have checked sparkplugs and fuel pressure damper as well. Now need to go through what you have instructed.
do you think the catalytic converter doesnt need to be replaced? I am residing in dubai and parts are not expensive to get. Over here is big ass used mercedes part market can procure whatever is required.
Nathan I have taken the vehicle to the garage over there found out there is leak in the engine chamber. thats causing the fumes and oil burning smell throughout the car. It happens when i am driving it for long time.
anyhow i appreciate your kind help. GOD BLESS
 
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