nathankershaw

I've googled this situation and get it coming up for other Mercedes but not the GLK.

When I fill to a full tank on my wife's 2011 GLK 350 2WD, I get a gas smell at the rear of the car until the fuel level drops.

Other cars seem to have rubber seal on top of the tank that fail that are accessible from under the rear seat.

Is the tank accessible on the GLK in the same way?

Just trying to get an idea of what I'm in for before I attack it & whether to go from the top or underneath.

Thanks in advance for any help.

GLK350_AZ

I just bought a 2011. My wife filled the gas tank last night and I noticed the smell with the car sitting in the driveway.. nothing was leaking onto the ground. Did you ever resolve your issue?

nathankershaw

Yeah. The top of the filter/sender/pump unit on the passenger side is cracked.
You can fill to 3/4 but anything over that and it smells.
We had a road trip so I had to fix it quick so I bodged it with Permatex black & it's held up for a couple of months.

The unit needs swapping out.

GLK350_AZ

thanks for posting the photos. I'll have to tear into it. I'll probably use the PTX also and order the part at some point.

PHML

I got the same issue on my wife's 2011 GLK....thanks for the pics. Is this a DIY project to replace the unit? Let me know how it goes...thanks again.

John V

hello, im new to the forum but i have the same problem and hopefully you can help. I found the cover for replacement on the fuel pump but i dont know if it needs an o ring to seal it down. If it does, can you please help me find the correct one? Im in the process of replacing it. And just put jb weld to hold the leak for now. TIA

nathankershaw

unfortunately our GLK was totaled shortly after I did this so I never took it any further.

John V

thank you. Sorry to hear that. I called the dealership and was asking for the part number but was told they never give it away.

TxMB2020

John, did you make any progress on this? I just got a used 2011 GLK350 with 105k miles and has the gas smell also. Where is the sender unit located and how hard is the DIY to patch the crack? I checked the VIN and looks like my vehicle was not included in the recall unfortunately. Thanks! -Kyle

John V

hey kyle,
i just did what nathan had done with his glk. its easy to get access to it. just below the passenger seat. the one on the driver side is the sending unit while the other side is the fuel pump. i did put jb weld but will soon change the cover. im just searching for the part number of the seal to complete it.

TxMB2020

I popped off the rear seats and there was easy access to the fuel pump cover. There was a crack just like Nathans and gas was actually sitting on top of the cover. Is this part number the correct one to replace the fuel pump cover? 2044700438 The car has 3/4 tank of fuel and gas was still seeping out of the crack which was surprising so tomorrow I have a road trip so I can run the fuel down to near empty to stop the leak then patch.

John V

i ordered mine fr partsgeek part # 30389-08054988. the gas was sitting on top of the cover on mine as well. i had to let the car sit outside the garage since my water heater and the washer/dryer was in the same location.

lostintime

This is an old post but my glk 350 also smells like gas after a fill up. They sell the a fuel pump module cover, is this ok or will I have to replace the whole pump? Cover is under $60 pump is well a lot more.

John V

just the cover.

lostintime

Thanks mate, just ordered it, about 70 USD with tax be in this week. I had figured as much but wanted to make sure. Thanks again

John V

i hope you did order the rubber seal. You need to change it as well.

lostintime

good to know. let go back to parts geek and see what I can find. Thank you

scautomag

Looks like my wifes 2011 is having the same problem. Gas smell on fillup. Lostintime, did you figure out which part number was for the rubber seal?
TIA

lostintime

Yes,

pretty sure thats all you need. Bought it at parts geek bout $30. Rip off but needed it and it goes on Wednesday

andreigbs

Here it is for $15 or so.

TheThrill19

Let us know how the install and replacement goes! I’m having the same issue. And pictures of the repair would be awesome if you have any.

Also, are these the parts you’re using?

lostintime

I live in Mexico and had to quick order online delivered to a PO Box in the US of A. Then drive to pick up the pieces and drive back.

lostintime

TheThrill19
Yes that them. Some one else will install so sorry no pic

39039

I fixed it.

Domovoy

A friends car has the same issue where there is a gasoline smell after fueling... the fuel pump cover located under the rear passenger seat is cracked due to age. The gasoline vapours and some liquid gas is leaking though so that is what we smell...

I looked into replacing the fuel pump assembly that has the float, filter and pump and that costs ~$350 USD... I have alternate option to potentially replace the cracked cover rather than the entire fuel pump assembly. If this works I will post the part number to make it more manageable for others...