Jun 17, 2015, 07:03 PM
Last edit by: IB Advertising
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- Mercedes Benz E Class AMG: How to Replace Fuel Pump
Step by step instructions for do-it-yourself repairs
Fuel leak issues - some investigation & DIY
Senior Member
Joined: Oct 2011
Posts: 419
Likes: 3
From: Southern Maryland USA
06 E55 AMG, 13 C63 AMG
Tore into my filter assembly today. What I thought was the fuel pressure sensor on top of the filter assembly is not a fuel pressure sensor. It is a tank vapor pressure sensor.
This car has a fuel pressure sensor somewhere. Does anyone know where it is located??
G
This car has a fuel pressure sensor somewhere. Does anyone know where it is located??
G
Senior Member
Joined: Jun 2014
Posts: 471
Likes: 32
W211 E55 2003
Did you find out where the fuel pressure sensor is at? Also how long did it take for you to do this job?
Senior Member
Joined: Apr 2012
Posts: 437
Likes: 1
From: Central PA
'05 E55
Job is easy and straight forward, but you'll need to access BOTH sides to remove the filter assembly (octopus). It goes across the tank and into the pumps on the other side.
Some points of note:
Hope this helps. Good peace-of-mind project. If you're not getting proper fuel to the engine (the margin of error decreases when you are asking for more power out of it than stock) all other mods are in vane.
Happy cursing.
Some points of note:
- You will need large filter pliers or MB Service tool to remove the large plastic nuts.
- Purchase two new plastic nuts as they will probably get boogered-up and are cheap.
- Get two new green seals. (the old ones are black, so must be updated).
- There are multiple styles of connectors, depending upon model year, going into the pumps. One uses a white fitting with a small C-clip to hold it, the other one is black and uses an integrated lock that you must push-in to release the fitting.
- As stated, the fuel outlet on the filter assembly is VERY brittle. If you are replacing, no big deal. If you are not, replace it anyway. The MB-stated service interval is WAY too long.
Take it apart and see how nasty it is. - Double check the lines running over to the pump side. It is easy to accidentally crimp them, thus cutting your fuel source.
- Double-check the fuel-pickup strainers on your fuel-pump side. One of my cars had it gummed-up with something. Take out and use carb cleaner, etc. or consider another cash contribution to the stealership for a replacement.
- Consider replacing short fuel hose coming out of filter. It's cheap and easy to get to. Do not re-use clamps and be sure to use fuel-hose clamps, not worm clamps.
Hope this helps. Good peace-of-mind project. If you're not getting proper fuel to the engine (the margin of error decreases when you are asking for more power out of it than stock) all other mods are in vane.
Happy cursing.
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
Does the pump and sender assemblies fit into the bottom of the tank in some sort of containment, or do just touch the bottom of the tank via the spring loading.
Is it possible for the units to be flexed back and forth depending on the acceleration and deceleration of the car caused by the gas movement from back to front when running in the 1/4 to 3/4 range (normal)?
Is it possible for the units to be flexed back and forth depending on the acceleration and deceleration of the car caused by the gas movement from back to front when running in the 1/4 to 3/4 range (normal)?
Senior Member
Joined: Jun 2014
Posts: 471
Likes: 32
W211 E55 2003
Job is easy and straight forward, but you'll need to access BOTH sides to remove the filter assembly (octopus). It goes across the tank and into the pumps on the other side.
Some points of note:
Hope this helps. Good peace-of-mind project. If you're not getting proper fuel to the engine (the margin of error decreases when you are asking for more power out of it than stock) all other mods are in vane.
Happy cursing.
Some points of note:
- You will need large filter pliers or MB Service tool to remove the large plastic nuts.
- Purchase two new plastic nuts as they will probably get boogered-up and are cheap.
- Get two new green seals. (the old ones are black, so must be updated).
- There are multiple styles of connectors, depending upon model year, going into the pumps. One uses a white fitting with a small C-clip to hold it, the other one is black and uses an integrated lock that you must push-in to release the fitting.
- As stated, the fuel outlet on the filter assembly is VERY brittle. If you are replacing, no big deal. If you are not, replace it anyway. The MB-stated service interval is WAY too long. Take it apart and see how nasty it is.
- Double check the lines running over to the pump side. It is easy to accidentally crimp them, thus cutting your fuel source.
- Double-check the fuel-pickup strainers on your fuel-pump side. One of my cars had it gummed-up with something. Take out and use carb cleaner, etc. or consider another cash contribution to the stealership for a replacement.
- Consider replacing short fuel hose coming out of filter. It's cheap and easy to get to. Do not re-use clamps and be sure to use fuel-hose clamps, not worm clamps.
Hope this helps. Good peace-of-mind project. If you're not getting proper fuel to the engine (the margin of error decreases when you are asking for more power out of it than stock) all other mods are in vane.
Happy cursing.
Will do this ASAP!
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Member
Joined: Nov 2003
Posts: 134
Likes: 0
From: Chicago, IL
1994 E320 Coupe, 1979 500SLC, 2005 E55 - Sold
Ok, so my car was working fine but was pooling some fuel around the DS pump. I found out that the fuel sender was leaking from a cracked plastic nipple. So I ordered a new sender from MB Atl. I followed all the instructions and replaced the fuel sender. Now the car wont start...double checked all the connections on the passenger side pump and all looks good. Where is the 4th hose supposed to sit? does it just sit on the PS of the tank? Any advise would be helpful. I would think the fuel pump relay or CPS but the car was working fine till I opened things up!
Last edited by spsinha; Nov 12, 2014 at 11:10 AM.
Member
Joined: Nov 2003
Posts: 134
Likes: 0
From: Chicago, IL
1994 E320 Coupe, 1979 500SLC, 2005 E55 - Sold
[*]There are multiple styles of connectors, depending upon model year, going into the pumps. One uses a white fitting with a small C-clip to hold it, the other one is black and uses an integrated lock that you must push-in to release the fitting.
Mine has white fitting's as shown in the picture above. One of the small white plastic c-clips was missing. Anyone know the part number? Can't seem to locate it on EPC.
Mine has white fitting's as shown in the picture above. One of the small white plastic c-clips was missing. Anyone know the part number? Can't seem to locate it on EPC.
Thread Starter
MBWorld Fanatic!
Joined: May 2010
Posts: 1,027
Likes: 55
05 E55 AMG, E320 CDI, Turbo E46 M3,IS300 2JZGTE,VQ35 Turbo Maxima, Mercedes 300D
The hoses have a "click" lock .. when you push the hoses together they lock and there is a red or black? (can't remember the color) locking tab. If the hoses aren't push locked together, they will leak under pressure and the car will not start. That is what happened to me at least.
Ok, so my car was working fine but was pooling some fuel around the DS pump. I found out that the fuel sender was leaking from a cracked plastic nipple. So I ordered a new sender from MB Atl. I followed all the instructions and replaced the fuel sender. Now the car wont start...double checked all the connections on the passenger side pump and all looks good. Where is the 4th hose supposed to sit? does it just sit on the PS of the tank? Any advise would be helpful. I would think the fuel pump relay or CPS but the car was working fine till I opened things up!
Member
Joined: Nov 2003
Posts: 134
Likes: 0
From: Chicago, IL
1994 E320 Coupe, 1979 500SLC, 2005 E55 - Sold
Ok, Im looking for the part numbers for the following part numbers:
1. the original clamp that goes on the fuel line
2. the small white c-clip that attaches the hose from fuel sender to the pump on the passenger side
1. the original clamp that goes on the fuel line
2. the small white c-clip that attaches the hose from fuel sender to the pump on the passenger side
Member
Joined: Nov 2003
Posts: 134
Likes: 0
From: Chicago, IL
1994 E320 Coupe, 1979 500SLC, 2005 E55 - Sold
Ok, so Ive checked both fuel pump relays and fuses by the air tank. All seem to be working as I swapped the relay to the other socket and the passenger side pump still works. No luck on the new DS sender unit. Could the unit be faulty? Anyone know which wires I can test on the harness to the sender to see if it has power?
MBWorld Fanatic!
Joined: Jul 2014
Posts: 3,323
Likes: 583
2005 e55 AMG
I replaced my pump and filter assembly last weekend in my 2006 E55.
VDO was on the external parts.
There are some slight differences between my car and the pictures in this thread. The pumps look different with different electrical connectors and the fuel line connections to the top of the pumps is also different. The rest loose pretty much the same.
The top part of the filter assembly in the picture above is not the pump cap. That is a fuel pressure sensor assembly.
Just FYI- I would double check those integrity of those worm clamps on that external fuel line. Unless those are specific for fuel injection hose you will likely have a leak form the hose from uneven clamp pressure. The OEM style clamps are the way to go as they are even pressure with constant spring tension.
G
VDO was on the external parts.
There are some slight differences between my car and the pictures in this thread. The pumps look different with different electrical connectors and the fuel line connections to the top of the pumps is also different. The rest loose pretty much the same.
The top part of the filter assembly in the picture above is not the pump cap. That is a fuel pressure sensor assembly.
Just FYI- I would double check those integrity of those worm clamps on that external fuel line. Unless those are specific for fuel injection hose you will likely have a leak form the hose from uneven clamp pressure. The OEM style clamps are the way to go as they are even pressure with constant spring tension.
G
MBWorld Fanatic!
Joined: Jul 2014
Posts: 3,323
Likes: 583
2005 e55 AMG
Now its even better. Just called Mercedes and am told the system has been redesigned and I can not just change the filter/sender assembly...both sides have to be done. Dang....all I want for Christmas is a new fuel filter Santa !!!! LOL
MBWorld Fanatic!
Joined: Mar 2011
Posts: 1,835
Likes: 12
From: The Granite State
.
Have them give you the MBZ part numbers for the "new" parts and I think you'll find they match the numbers that have been posted on these threads for the last couple of years..... A total of 4 part number changes have occurred that I'm aware of.
-G
Thread Starter
MBWorld Fanatic!
Joined: May 2010
Posts: 1,027
Likes: 55
05 E55 AMG, E320 CDI, Turbo E46 M3,IS300 2JZGTE,VQ35 Turbo Maxima, Mercedes 300D
So I know that Mercedes is now fixing this issue free of charge in many cases. However, they are not fixing all vehicles. My E320 CDI is one of those that is not on this campaign. Also after replacement, I wonder if the new ones will leak in the future? Unless they change the plastic type, it will likely leak again. I decided to fix my E320's sender in the following thread:
https://mbworld.org/forums/diesel-fo...ml#post6803992.
I did this on my fuel pump side before but only on the outside and it is still holding up. I think having the coating on the inside also will help even more. Hope this helps someone out. $15 fix is not bad for this issue. I am sure this can be applied to BMWs also. The pumps/senders are very similar in design.
https://mbworld.org/forums/diesel-fo...ml#post6803992.
I did this on my fuel pump side before but only on the outside and it is still holding up. I think having the coating on the inside also will help even more. Hope this helps someone out. $15 fix is not bad for this issue. I am sure this can be applied to BMWs also. The pumps/senders are very similar in design.
Newbie
Joined: Jul 2018
Posts: 2
Likes: 0
2010 E63 amg
Fuel leaking
I have a 2010 E 63 amg.. My car is doing the same thing ...there is a puddle of gas under the seat and the fuel pump is cracked.. The recall is only up to 2009and my car is 2010 I really need help the car is very unsafe to drive .. Mercedes Benz of lavegas has had system problems for the pass few days so I can't get a answer about if the recall will cover my car or not.. Please give me any advice u can seeing that the last post was in 2015
Junior Member
Joined: May 2015
Posts: 41
Likes: 0
From: La Quinta, CA
CL600 E55 / SL500
Fuel Leak
My 05 E55 had a fuel scent in the cabin that would not subside. I received a MBZ notice of a fuel defect. I took it to MB dealership and they fixed it free of charge. Never a problem thereafter.
MBWorld Fanatic!
Joined: Aug 2011
Posts: 3,428
Likes: 288
From: New Zealand
I have a 2010 E 63 amg.. My car is doing the same thing ...there is a puddle of gas under the seat and the fuel pump is cracked.. The recall is only up to 2009and my car is 2010 I really need help the car is very unsafe to drive .. Mercedes Benz of lavegas has had system problems for the pass few days so I can't get a answer about if the recall will cover my car or not.. Please give me any advice u can seeing that the last post was in 2015
Newbie
Joined: Jul 2018
Posts: 2
Likes: 0
2010 E63 amg
Being that my car is a w212 I may have to cover these expensive out of pocket ? Smh I don't see why they would fix all E CLASSES considering that they all have the same problem this is very unfortunate for me. I purchased it less than 4 months ago and the gas is pouring out everywhere this is very unsafe to drive I have children that don't ride in the car due to the Strong gas smell.
MBWorld Fanatic!
Joined: Aug 2011
Posts: 3,428
Likes: 288
From: New Zealand
Being that my car is a w212 I may have to cover these expensive out of pocket ? Smh I don't see why they would fix all E CLASSES considering that they all have the same problem this is very unfortunate for me. I purchased it less than 4 months ago and the gas is pouring out everywhere this is very unsafe to drive I have children that don't ride in the car due to the Strong gas smell.
