c63amg08

One morning I go to my c63 and the garage smells like gas. Don't think much of it at first but the smell stayed. Took it to the mechanic, took off the back seats and noticed a puddle of fuel above the driver's side sending fuel unit.

The mechanic replaced the whole fuel sending unit and after driving it for a few hours i took off the seats again to check. This time it was completely dry which is good. Problem is, the gas smell is still noticeable. It is definately less then what it was before we fixed the FSU but it is still noticeable when you get in the vehicle.

My question is, since I had a full tank when the mechanic was replacing the FSU did he just spill some gas on the bottom which made it smell like gas or do I have a leaking fuel tank.

One more obesrvation is that it smells like gas right above the driver's rear wheel. If i put my nose like 1 inch away on top of the rear left wheel I can smell the fumes. Either way I opened all my windows and will let the car sit in the garage. If the smell is still there tomorrow will take it to the mechanic.

AMG893

I think it could just be the remanence of the previously spilt fuel.
Fuel has a lingering type of smell about it. Hard to get rid of.

Try using some odour neutralising spray of sorts (like Glen 20 maybe) or maybe research on the net some natural ways (maybe lemon spray or something?)

Also, try get under the car on a hoist, or ramps at least and see if you can high pressure hose around there.

c63amg08

Thanks for the reply, the smell seems a lot better now and can barely smell it inside and outside. will give it a few more days and will also take it to the carwash today.

AMG893

HBC350

Don't have an answer to your question but I do have a suggestion. Be real careful with that electric tool near the FSU. I once saw a Rolls Royce tech use one of those to take the screws off a FSU that was located in the trunk and it ignited the fumes and scorched his mustache and eyebrows off!

c63amg08

yea its sketch working with gasoline. One spark will ignite the whole thing.

c63amg08

Well after getting the fuel sending unit replaced i couldn't fill up the car with gas all the way. When I went to 5 different gas stations and tried to pump gas the pump kept on clicking as if the tank was full. That leads me to believe that the fuel tank / fuel neck is bad. Getting that replaced.

While i'm at it i decided to get an ecu tune by kleemann and get some MHB long tube headers. Atleast I will get my c63 back faster than before.

kenneyd

Delete

JimGnitecki

I do't knwo the specifics of the C63 fuel venting system, but this GENERICALLY sounds like your fuel tank venting system is plugged. That could be causing all your symptoms.

USUALLY, when a fuel venting system gets plugged, it is because the fuel tank has been overfilled by going past the "stop click" when filling, OR because the gas cap itself needs to simply be replaced.

Jim G

zcct04

Two year old thread . .

JimGnitecki

Didn't notice.

Jim G

KC61

You can do it with a Garmin GPS and their BC30 backup camera. The input changes anytime power is applied to the camera. Maybe not what you are looking for but it is doable. We installed the Garmin and BC30 in my wifes 2013 GLK350

realflash

[removed, wrong thread]

fatherhood

BF_JC230

Wrong forum.Scrolled too far down...