Replacing Fuel Level Sending Unit: 2002 C240
I will post some pictures later I would like everyone to look at. I have a few questions about the isntall now that I have the parts in my hand. One good thing about having the parts in hand so early, I can screw around with them and see how everything fits so I will know how to dissasemble the parts in the tank.
My main questions:
Do these parts hang from the top of the tank? It appears that way.
Is the fuel pump in one of these units or is it seperate?
Saturnstyl: You commented earlier, "You will notice they are spring loaded to hold the senders to the bottom of the tank. Be careful upon reinstallation, the sender can flip sideways and cause problems. "
I clearly see the springs on the right unit (passenger side). When you say they are spring loaded to the holde the sneders to the bottom of the tank, are you talking about the float arm? I am curious what that big long spring on the right unit does. The left unit has a spring but it looks different than the right unit.
I will have pictures up later tonight so please feel free to wait and see the pictures before you post.
Regards,
Eric Barger
Hopefully, this will help everyone see what exactly is in there tank and help illustrate idea's.
It is ~1 meg in size.
http://www.installuniversity.com/mb/...er%20house.jpg
Thanks,
Eric
The springs have nothing to do with the float arm, that should move freely at all times. The springs are there simply to hold the sending units in position.
When you said that it may try to turn sideways and may not seat properly, you meant the entire assembly because the spring may cause the unit to flip-flop when closing the lid.
Also, I never really thought about it, but I guess the tank would be fairly small.
Sounds like a fairly straight foward install.
Thanks again,
Eric
Is the fuel pump inside the driver's side fuel level sensor? So when I unplug both cuoplings on the drivers side fuel level sensor compartment, that will unplug the fuel pump?
Thanks,
Eric Barger
www.installuniversity.com
Another question, which connnector do I need to unplug to cut the power to the pump? Or just do both of them?
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I would like to thank everyone for their help but especially Saturnstyl for his major contributions to the effort.
The install was straight foward and no problem to tackle what-so-ever.
My friend did break the retaining clip on the plug in module for the fuel pump. The one I asked about above. I could have beat him over the head with a sledge, but it was an accident.
Anyone know how to repair such a mess? Is it safe to order a new harness and clip off the broken module and splice in a new one? Right now I have a long zip tie going around the two black hoses making a semi retaining strap over the module to keep it from coming out.
Install document coming soon.
Eric
www.installuniversity.com
A) from the cars harness to the top of the drivers side sending unit
B) at the wiring harness that runs from the left sending unit to the right sending unit.
If zip ties are holding and working I wouldn't screw with it. In case of line A, you would need a body harness which is mega bucks....
In case of B, you could just cut and solder from the old unit to the new unit.
There is also worst case scenario, which is use some clear silicone or superglue, depending on whether or not you think you will EVER have to do this again. Remove the weather seal, apply glue, reinstall weather seal, then apply glue to the weather seal on the outside, and install connector. Let dry and test for holding power.
Also if you still have the part he broke off, you can simply superglue that back on to the connector, and it will hold also. I don't mean glue it where it broke off. Put it on like it wasn't broken and glue it in place.
How hard is it to replace the entire harness running from the top of the driver side sending unit to where ever?
Eric
I encourage everyone to check it out.
Thanks again everyone.
Eric
www.installuniversity.com
How hard is it to replace the entire harness running from the top of the driver side sending unit to where ever?
Eric
-s-
Many thanks.
There is a small problem of the W209 IC having a nonsense code that makes the fuel level go up and down like a yo-yo on the display.
greetingz,
I had a 1979 240D with a bad sender and it was not only easy to remove I was able to repair it instead of having to replace it.
This is progress..?



