mrweelr

Interesting. I picked up some Loctite Heavy Duty Epoxy for this repair, but I also have a can of Right Stuff in my garage. Does anyone know what material the sending unit housing is made from? Not sure if the epoxy or Right Stuff is the way to go for the repair. Has anyone tried filling cracks on these before with success?

http://www.loctiteproducts.com/p/epx...Heavy-Duty.htm

mrweelr

I believe the o-ring was seeping due to cold temperature shrinkage, but I don't know for certain. Replacing this part has definitely fixed my fuel leak/odor issue. Have been running the heater at max due to the cold temps and not a hint of fuel odor in the cabin or under the hood since this part was replaced

06cls55amg

good to hear, use the epoxy then put the right stuff over the epoxy if you want, i used epoxy resin on my rxpx's bilge pump setup to keep it in place in the hull, and its been holding for 2 years now, with oil and fuel residue floating around the bottom, from constantly upgrading my ski. so far the plastic base is still stuck to the ski.

mrweelr

OK, I'll go with the epoxy and lay it on thick. Thanks for the help!

Miniac

Anytime. The EPC is helpful but a pain sometimes to find what your looking for.

06cls55amg

so i dont think my diaphragm was the issue.... i dont see any fuel around or sign of it spewing fuel. will replace the seal and re install.

the only other thing worth mentioning is that the rear passenger side intake port/ gasket is wet and looks like fuel/air might have been getting passed the gasket.

Is this possible?

actech

mrweelr it took me forever to figure out what angle your first pic was taken from but i finally did and i have the exact same problem. thanks to you, and shard and all the other helpful people, i found my lingering gas smell finally. i hope pic i attached works. first time loading pic. now i just have to find the part# for an E55

mrweelr

actech - That definitely looks like the exact same leak I had. The part number for the pulsation damper is visible in the picture I posted on page 2. Good luck with the fix and enjoy driving your car again :-)

Critter

06cls55amg, in your first picture is the fuel hose squeezed between the pump screw cap and the frame, it looks like the hose bulges at the contact point, should the hose not be oriented to the open space showing at about 6 o'clock position.

actech

i do not see a part number mrweelr

hidz84

Hii, I am having the same problem on my sl55, smell of gas outside and inside while it idles and sometimes in cruise, I found a leak on the fuel damper (regulator) I replaced it and done an overhaul for the injectors now the same smell still comes and goes plus the idle gets sluggish sometimes too, please help advice guys I started to hate my beast :'(

novae500

Looks like I have this fuel leak as well from dampening gasket. Getting smell after cold start up and going thru the vents. Ordered the part and will get installed

benz2nr

Had the same problem dealer replaced the o rings on the injectors fixed the problem

novae500

Update. Replaced the fuel dampening part and no more gas smell from cabin vents. Good that this the part that needed replacing. Part #1120780092

ALEN35

Bump

j.tom

To those who Done this before,Is it possible to replace that pulsation damper/pressure regulator without lifting the fuel rail ??? THANKS!

**JPAMG**

Yes, you can do it without removing fuel rail....you will have to remove the passenger side surge tank though....push some rags under the damper to catch the fuel. Make sure all the fuel pressure is off the rail....every time you turn your key to #2 position it will pressurize the rail. Depending on how bad its leaking it won't have pressure. Usually when they start leaking they poor out the fuel pretty good so you shouldn't have to worry. I just had to replace mine yesterday after larger injectors and tune....after you do it once it takes 15min...correction I also had the TB off as well

06cls55amg

i replaced my o ring on mine and i havent had the fuel smell return.

Mikeki7

Do you have a link to the o ring or the type of oring? Dont see the need to replace that whole regulator.

356cherie

has mercedes done anything in regards to wearing the cost to rectify the fuel leak in the w211 E55- I had to remove my family from the car the other day as the fuel smell was that bad and walk home I have dropped the car off to the dealer and asked him with no reply yet - I thought it was just my car until doing some research - completely unacceptable warranty or not in this day and age - thanks

StarvingArtist

Welcome, there is a detailed thread on this topic near the top of the forum.

Sugar_Mouth

I have the leak as well at the regulator/damper. Off to get parts now.

CLS.55.AMG

PLEASE READ. I am currently having my car repaired by the dealership at no cost to me. I went back and forth with Regional reps in N.J., and the Service Manager agreed to replace both sending units for free. They now called back and stated that MB issued an "extended warranty " on the entire fuel system, and said we will be getting new fuel lines and a tank as well. NO COST, and we have a loaner. I suggest everybody look into this. I went back and forth with the dealership for months with this wonderful outcome. I created this account today just to notify all of the other frustrated owners of vehicles that are defective and dangerous. Please feel free to PM me for more details in regards to what I did, and for pics of the leaking fuel sending units. I am posting this because I am not sure if they will make an anouncement, or apply it to customers who provide enough pushback. PLEASE READ, I am sure you all are as frustrated as I was.

Sugar_Mouth

So here is my issue:






Both independent shops in town claimed you had to remove the fuel rail to remove and replace the regulator. I have not removed the regulator yet but from what is said here you don't need to remove the rail.

I have the throttle body gasket and the surge gasket and am waiting for the regulator to come in tomorrow.

BagMan

I just replaced mine yesterday and it fixed the fuel smell I was getting in the engine bay. Found it for $49 at MB of North Lake http://www.mbnorthlake.com/index.htm You can purchase from them online.

You can see how shriveled up the old O-ring was.