Does anyone know how to access the fuel guage sending unit in a 300TD? Do I have to drop the fuel tank or is there an easier way?

Mike

Greetings Mike,

To gain access to your sending unit on your station wagon remove the rear floor compartment lid and the plastic panel or tray beneath it. You should find your sending unit and wiring harness once you do this. If you are replacing or removing this unit, a new seal will have to be installed or your tank will leak fuel as it sloshes around.

Charles

__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan

This is the beauty of MB and actually VW and Audi. To gain access to sending units or fuel pumps, you don't have to remove the fuel tank. For my Passat and my neighbor's Audi 100, there is an access panel in the rear floor, above the tank. To get to the sending unit in my SD and the W123 sedans, you just remove the first aid kit and there you go. Now, I know how to get to the one in my TD. These are cars were definetly built to be worked on.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member

Done and done! Thanks for the info Charles! I have my fuel gauge back!

300TD,1987 fuel gage does not go over half full when filled but does decrease as fuel is used...Sending unit?

Fuel gage will not register beyond half when full but decreases when fuel is used.
Is this mean a bad sending unit?

another member with a TD that lives near me!
if you are discussing a Wagon, then it's fairly easy to remedy, if your tank has not collapsed from vacuum... if it's a sedan, slightly more so!

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My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

just pull sender and clean with carb spray-avoid tweaking the nichrome wires which are hair like in diameter - bottom of sender contacts and top can get sludged up and not create good electrical contact -good luck!

Could just be sludge on the wires the unit slides on.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

You will need to remove the sending unit and clean it. here is a good DIY for the W124.

http://www.peachparts.com/shopforum/diesel-discussion/231269-diy-w-pix-w124-fuel-sender-disassembly-cleaning-testing.html

Just noticed you have a 300TD, that would be a little different than the sedan. Did you mean, Turbo Diesel, or Touring Diesel?


Charlie

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2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

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