Yeah, Rhode Island and I'm kind of surprised too. In nearly 20 years driving these old beasts, this is the first time I ever saw issues with the fuel and it was actually a fairly cool summer. I don't know, maybe it isn't algae but it doesn't look like rust. I don't drive the car a lot but at the minimum every couple of weeks and most weekends. I dumped some stuff in the tank, seafoam, diesel cetane enhancer (white jug) and am driving it 100 miles today. Plan is to run it down and re-fill at the local truck stop. Ran fine coming into work this morning.

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1985 300D 197K - Semi-Daily Driver Diesel
1998 Volvo V70 AWD 226K - Daily Driver 2
1998 Volvo S70 140K - Wife's DD
2003 GMC Sonoma ZR2 Option - Rusty Truck
THE BABY 1958 220S Sedan 66K All original, never restored and never will be.

Sounds like a plan - perhaps a filter change is in order sooner rather than later as well?

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Afaik algae growth is not temperature dependent but moisture/water dependent. Moisture get in via condensation from changes in ambient temp. Cars seldom driven are more algae prone because the water just accumulates. Startron Biobor etc is your friend

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

I changed the primary and secondary fuel filters already. The primary that was on it was white plastic that you couldn't see inside. The new one is the more typical clear type. I'll get the Startron stuff at the local boat service place. Plus, the car is going back into daily use as my wife's primary mode until I find her something to replace her Volvo that needs more tlc than it's worth. Only 'till the snow flies though as I don't drive the Mercedes in salted-roads mode.

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1985 300D 197K - Semi-Daily Driver Diesel
1998 Volvo V70 AWD 226K - Daily Driver 2
1998 Volvo S70 140K - Wife's DD
2003 GMC Sonoma ZR2 Option - Rusty Truck
THE BABY 1958 220S Sedan 66K All original, never restored and never will be.

Really? I had never heard of it as a problem here in Northern Europe until I happened upon a little lesser known website called Mercedes Shop...

...sorry - I don't want to be contrary but I'm not convinced it is not temperature.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!