MB 1985 300TD Wagon Fuel Expansion Tank bad again! - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 09-09-2009, 11:33 AM Thread Starter
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MB 1985 300TD Wagon Fuel Expansion Tank bad again!

Re: MB 1985 300TD Wagon Fuel Expansion Tank bad again!

The title says it all. I replaced it 18,074 miles ago. This is the little plastic tank above the spare tire in the back of the MB 300TD wagon. I believe its purpose is to give your fuel some place to go if you fill up the main tank with Diesel and on a warm day the fuel expands. Saw a puddle of fuel under the spare tire area so I investigated. I removed the tank thinking the hoses had gone bad. The tank was cracked in two places. Looked like stress fractures. The tank was well secured when I removed it BTW.

I went to the local Mercedes and spoke to a mechanic. He said he does not replace them very often and to his knowledge this part is not prone to failure.

The tank is plastic...I run B100 so I doubt the Bio is eating the tank.

Has anyone had similar issues or is this an isolated incident.

$147.34 for a new tank...


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post #2 of 2 (permalink) Old 11-09-2011, 03:07 PM
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this plastic expansion tank just developed a leak in my 85 300TD Wagon too.

you can purchase it from World Impex for $119:
Mercedes-Benz EXPANSION TA (123-470-01-89)
sunrg is offline  
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