Fuel pump help needed
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2010 Mercedes-Benz E350
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You should disconnect the battery. If you follow the instructions in the manual without any variation, will you really fry a SAM?
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
John - The SAMs on your car are a lot more robust than early ones. I'll put money on the fact that the dealer would not bother to disconnect the battery but you are playing around with fuel vapour all over the place & really don't want a spark. Disconnect the battery & have a fire extinguisher close at hand - please!. You could still have some charged caps in the system. Keep ignition off & keys in your pocket. You have not had much luck lately. You have a Star if you have any post disconnection synch problems.
Last edited by Glyn M Ruck; Jan 25, 2011 at 07:17 PM.
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2007 C230SS; 2014 ML350 BT
John - The SAMs on your car are a lot more robust than early ones. I'll put money on the fact that the dealer would not bother to disconnect the battery but you are playing around with fuel vapour all over the place & really don't want a spark. Disconnect the battery & have a fire extinguisher close at hand - please!. You could still have some charged caps in the system. Keep ignition off & keys in your pocket. You have not had much luck lately. You have a Star if you have any post disconnection synch problems.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Coming from the industry I'm not the most careful person myself. A case of familiarity breeds contempt. All you need is the correct AF ratio and a spark & the whole fuel tank will go up because you have it open from inside the car.
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Fuel filter before the pump my *** 
Look at the pics of the new pump:
So, it appears the change to the late W203 and W204 that eliminated the fuel filter, did NOT in fact change it to before the pump. The pump just clearly has a standard sock filter that almost all in-tank pumps have. So, the late 203 and 204's essentially are running on unfiltered fuel. Obviously another BS cost cutting measure.
I am going to investigate adding an inline filter somehow.
Look at the pics of the new pump:So, it appears the change to the late W203 and W204 that eliminated the fuel filter, did NOT in fact change it to before the pump. The pump just clearly has a standard sock filter that almost all in-tank pumps have. So, the late 203 and 204's essentially are running on unfiltered fuel. Obviously another BS cost cutting measure.
I am going to investigate adding an inline filter somehow.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Dirt is the killer of FI systems. John - Is there any way you can retrofit the old filter. I guess you don't have all the piping. Is the mounting point still there?
Cheap *******s - Anyway - the pump still ingests dirt as the old ones did other than the nut & bolt catcher.
Presume they have not installed an inline filter up front??? I think you said it was no longer a service item.
Cheap *******s - Anyway - the pump still ingests dirt as the old ones did other than the nut & bolt catcher.
Presume they have not installed an inline filter up front??? I think you said it was no longer a service item.
Last edited by Glyn M Ruck; Jan 27, 2011 at 05:38 PM.
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I thought the fuel pump is on one side and the fuel filter is on the other side. John, would you please look in the other cavity, I am thinking the fuel filter is in the other cavity.
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I must be a very dull crayon, because I had to go back and read this. I thought you were suprised that there was not a pre-pump and post pump filter. Now it sounds like you don't have one at all! Are you saying that not only is there no fuel filter built into the pump, but you don't have an inline fuel filter either? If that's the case I think I'd be calling and yelling at MBUSA (even if just to get it off my chest)
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Dirt is the killer of FI systems. John - Is there any way you can retrofit the old filter. I guess you don't have all the piping. Is the mounting point still there?
Cheap *******s - Anyway - the pump still ingests dirt as the old ones did other than the nut & bolt catcher.
Presume they have not installed an inline filter up front??? I think you said it was no longer a service item.
Cheap *******s - Anyway - the pump still ingests dirt as the old ones did other than the nut & bolt catcher.
Presume they have not installed an inline filter up front??? I think you said it was no longer a service item.
When I went to replace the filter initially, I followed the lines all the way up front, but found no filter. I was told by the lead tech at the dealer, that it was BEFORE the pump and no longer a service item.
I must be a very dull crayon, because I had to go back and read this. I thought you were suprised that there was not a pre-pump and post pump filter. Now it sounds like you don't have one at all! Are you saying that not only is there no fuel filter built into the pump, but you don't have an inline fuel filter either? If that's the case I think I'd be calling and yelling at MBUSA (even if just to get it off my chest)
Considering the 07 C230 is a flex fuel vehicle, I find it completely asinine that they didn't have a regularly serviced stainless steel inline filter. I will be finding a way to retrofit one. May even install a filter/water separator.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
I'm really hoping you find a filter on the drivers side - I'm becoming less optimistic. What the hell were they thinking!
Maybe the bolt catcher is more efficient than we think but I doubt it. The reason the filter has always been after the pump is that it can't live with restriction on the suction side without cavitating at large demand.
Maybe the bolt catcher is more efficient than we think but I doubt it. The reason the filter has always been after the pump is that it can't live with restriction on the suction side without cavitating at large demand.
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Something Slow
My Fuel Pump Died Last Night pump Cost at the Dealer $358 + 140 Labor:-(. i have C320 this should be an Easy DIY job Correct? because am getting the pump online for $246.
Last edited by WaveyKat; Jan 28, 2011 at 11:24 AM.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Hah! splinter - Indeed I hope you are correct - I see this is for M113/C55. Man I hope it's the same for newer M272's - This would make sense.
In the words of Henry Higgings - Shaw's Pygmalion - "By George She's Got It!"
I hope
If this is the case - dealer has it wrong again!
In the words of Henry Higgings - Shaw's Pygmalion - "By George She's Got It!"
I hope
If this is the case - dealer has it wrong again!
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From: Camas, WA
2007 C230SS; 2014 ML350 BT
Nice find Splinter! The part number for the delivery unit on my car is 2094700994. I bet they are essentially the same, or maybe a revised part.
I will crack the other side to verify.
I will crack the other side to verify.
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2007 C230SS; 2014 ML350 BT
She's ALIVE!
Fuel pump replacement complete. I had just under half a tank and the fuel was 1/4" from the top of the tank ring Good I guess in some ways, less vapor, but had to deal with all the fuel disconnecting and connecting everything. Also, the new seal was very different from the original and creates a much larger gap for the clamp ring, and I already have tightened it more than 8 Nm. This is the new 0199972345 seal, and my orginal 0169974145 was superseded. I did not use any lubricating paste like is called out in WIS part number 0009890160, as I missed that before and didn't have any on hand. I will stop by the dealer on Monday, grab some paste, and a 1/4" torque wrench. My 3/8" one won't fit in there. I will pull the clamp off lubricate the seal, and re-torque the clamp.
Here is a pic of the gap:
Fuel pump replacement complete. I had just under half a tank and the fuel was 1/4" from the top of the tank ring
Good I guess in some ways, less vapor, but had to deal with all the fuel disconnecting and connecting everything. Also, the new seal was very different from the original and creates a much larger gap for the clamp ring, and I already have tightened it more than 8 Nm. This is the new 0199972345 seal, and my orginal 0169974145 was superseded. I did not use any lubricating paste like is called out in WIS part number 0009890160, as I missed that before and didn't have any on hand. I will stop by the dealer on Monday, grab some paste, and a 1/4" torque wrench. My 3/8" one won't fit in there. I will pull the clamp off lubricate the seal, and re-torque the clamp.Here is a pic of the gap:
Last edited by johnand; Jan 29, 2011 at 06:09 PM.
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Good news indeed!! - guess you did not have time to check for filter on the other side? splinter's post above gives me hope.
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I should have read that closer before, but it states it is in the fuel tank sender. The real question, I have yet to find the answer to, is how often it needs to be changed. No real consensus from anyone at MB
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
