kiluminati616

My car was never repaired under the extended warranty and I just discovered that I’ve got a leak on the top of the sending unit. My pumps still look fine so I’m wondering if I can just buy the new sender. I’ve gone thru a bunch of old threads but the part numbers have been updated a few times and I’m not sure what the answer is in May 2020. The pumps are 211-470-1794.


I should mention that I’ve never smelled fuel in my car after filling up so I’m not sure if my issue is as big as the one many people go thru. I really just got curious to look at my pumps/sender as I approached the 60k fuel filter change and that’s when I noticed old gas on the top.


I’m kicking myself for never looking at this before as I’m sure it would’ve been covered. Anyone had any luck getting their car repaired out of goodwill by mb? This is my first Mercedes and I’ve never been to the dealership so I’m not quite sure of my chances

Oh yeh my cars an ‘04 with a build date of 10.31.03 & 60k

KAMG

You have the original pumps. The new sender units are only compatible with the newer updated pumps. The ideal way would be to find a NOS sender unit, otherwise you'll have to spend double and replace both sides. Let me know if you're able to find any of the old sender units, I haven't had much luck

kiluminati616

Damn that’s what I feared. Do you happen to know the part number to the old sender?

word to the wise - check your pumps & sender before your warranty expires. Even if you don’t have the telltale fuel smell at fill up it’s possible there are leaks and will be covered by the extended warranty. I started out thinking I needed just a fuel filter for my 60k maintenance and now I need to drop $1100 just in parts. Don’t be like me 😬

I’m wondering if there’s much value in selling my old pump to someone who isn’t looking to replace their entire system like me 🤔

E55Greasemonkey

Unplug the pump and look at the connector pins. There's a good chance they are burnt and you'll need to replace everything.

bbirdwell

Note: Configuration 1: first-generation fuel pump and the first and second-generation filter/regulators are compatible with each other. Configuration 2: Second-generation fuel pump is compatible with the third-generation filter regulator and each require an adapter cable to connect to the OEM harness. Configuration 1 parts are not compatible with Configuration 2 parts.

In this thread, compatible part numbers are found beginning in post #29. Configuration 2 listed above requires adapter cables between the new parts and the car's electrical harness.
https://mbworld.org/forums/w211-amg/...y-parts-2.html

kiluminati616

Thanks Barry. I’ve read thru a lot of your posts and appreciate the help you’ve provided to me and others.

I’m not positive im reading the schematic correctly. Is the current fuel pump generation 2?
1794 -> 0000
and the sender is generation 3?
2494 -> 5194 -> 6494

if so, unless I can find a NOS 5194 sender then everything needs to be updated. Probably makes more sense to go that route anyway. They updated them for a reason I’d assume

looking at the full kit on fcpeuro and it appears to have everything needed. Can anyone confirm?
https://www.fcpeuro.com/products/mer...des-2714700000

bbirdwell

You are correct in your statement about the parts' generations.

That FCP Euro kit has all that is needed.

To remove the fuel lines from the fuel pumps there is a different requirement for old versus new pumps. The old-style fuel pumps you have require the snap connector lock to be "pulled" away from the connector. The new-style pumps require the snap connector lock to be "pushed" or "squeezed" into the connector.

Don't forget to tie a long line around the old fuel pumps' fuel lines when you remove the filter/regulator. Then all you have to do is take that line, tie it around the new fuel lines, and pull the fuel lines back over the saddle. If you try to use your hands alone it can be quite frustrating.

Also, either get the fuel gauge down to 3 bars or less or jumper the fuel pump relay and bleed the fuel off at the fuel rail at the schraeder valve.

KAMG

I'm in Canada so it's not covered unfortunately. I pulled the lids off last year and they were good, I have no issues with fuel smells or anything either. They are due for replacement though, will order the FCP kit once borders open back up. My buddy got the same kit and it seems to have everything you need. $1000+ to replace a $10 filter

I doubt the original pumps will interest anyone, since the old filter/regulator units are impossible to find now. Plus most of you guys in the US are covered and will get the updated parts under the warranty

Pumps: 211 470 1794 ----> 211 470 0000 (updated)
Filter/regulator: 211 470 1741 ----> 211 470 6494 (updated). I have 1741 on my car, and I think the latest one is 6494, so I'm guessing I'm missing the part number for the second generation unit

kiluminati616

@bbirdwell awesome, thanks. I’m comfortable w changing fluids and brakes and the like but tinkering w the fuel system scares me a bit. I’m gonna have my Indy install the fcpeuro kit. I’ve also seen that you recommend updating the relays & fuses so I’ll run that idea past them as well

@KAMG thats a bummer Canada didn’t get the extension. At least now we’ll have the fcpeuro refund guarantee.