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1967 250SE. 1983 280SL 5 Sp. 1991 300CE. 1950 MG TD.
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18 Posts
Discussion Starter · #1 ·
Allo.

Own the W124. 1991 CE-24----Coupe---2 door.

Gas gauge/needle wiggles...
Bought new MB p/n 1245420004-fuel sending unit.
Searched the files for the exact location
of the fuel sending unit, but no joy.

Where, exactly is it...? (I know it is in the gas tank..)
How to get to it to remove & replace...?

Remember, it is a 2 door, with small rear seat area.

Many tks ....

DrRx.
 

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W124 Moderator
86 190E 2.3L 16V, 2 95 320TE's, 02 S500
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13,172 Posts
Doc,

Pull the trunk liner (vertical section facing back of back seats) and you'll see the gas tank exposed. From that point you'll easily see what is needed to R/R the sending unit.

Good Luck,

Jayare
 

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Registered
1967 250SE. 1983 280SL 5 Sp. 1991 300CE. 1950 MG TD.
Joined
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18 Posts
Discussion Starter · #3 ·
Thank you...

To 'pull' the trunk liner....
Up or out ....
Are there any fasteners or clips...?
Does it simply slide....?

The car is not immediately available, but will
be Sunday afternoon.

The new part does not show a gasket. Will a new one
be needed...? Nothing was noted on the part list that a new gasket
was needed/used...!


Again, thank you.


DrRx.
 

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Registered
1991 300E
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601 Posts
From the service manual illustrations, it appears that for a coupe you gain access by removing the back seat: 47-7000D Removing and installing fuel gauge sending unit. I found this in the on-line Model 124 Maintenance Manual. While there, I also found a user's write-up on Fuel Tank Gauge Sender Removal & Installation. The factory manual says to replace the O-ring with new.

Looking at the 1245420004 sender, I wonder if it will be a direct fit. The geometry seems to indicate it's for a sedan, not a coupe--see 47-7000 Removing and installing fuel gauge sending unit. A phone call to a dealer's parts counter or good on-line parts supplier should clear this up.
 

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1955 300SL, 93 300SE, 91 500SL, 1989 190E2.6
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607 Posts
I have a 1990 M104 300CE and I didn't need to mess with the back seat, the fuel tank is in the trunk just look all the way forward to that panel and pull on it, it will come loose, can't remember if you pull it up or what but just pull on it, once out you can see the fuel tank, the sender unit is at the center of the tank facing rearward near the top, but not on the top. Has wires going to it. Could be they are not all the same, but that is how mine is...here is a photo of it. To replace you have to unscrew the big nut, it's really big, I used a pair of large channelocks pliers then the sender pulls up and out, with a little fiddling.
 

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Registered
1967 250SE. 1983 280SL 5 Sp. 1991 300CE. 1950 MG TD.
Joined
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18 Posts
Discussion Starter · #6 ·
Hooray........Joy in the camp....!

Inspected the trunk area: W124051-91 300 CE-24. Coupe. 2 Door.

The liner on the back of the rear seatback is held
to the top of the trunk area by two metal prongs.
Push the liner from under the prongs and pull liner out
or toward self, and the gas tank top is exposed.
The sender unit is in the center and is recessed.

Easy access....

However, if you don't know this technique/tip
you'll send lots of time, and energy wrestling the back
seats and other stuff.

The part will arrive this week and it seems as if the
R & R is a simple one....Maybe 20 minutes.

Major key for this task:

Clear, exact, info/data/parts and application for the job.
If confused, or puzzled, ask for help.

This task applies to my 91 300CE-24. Coupe.
It may not apply to other W124 300CE models.

When task is done, I'll inform this thread.
But it seems as if 80% of the job is done, which
was to find the exact location and how to get to it....:)

Once again, Many tks to all.:bowdown:

DrRx.
 

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Registered
1967 250SE. 1983 280SL 5 Sp. 1991 300CE. 1950 MG TD.
Joined
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18 Posts
Discussion Starter · #7 ·
UPDATE.

The news is good.......!

With the exact location, and the correct part and
a very large socket/handle. The R & R was an easy
20 minute task.

The old fuel sending unit had come apart, after 19 years.
Installed new one and, voila, back to normal with no
wiggles, and accurate gas level readings.

Many tks to all.
And to all, have a Merry Ride.


DrRx.
 
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