Date registered: Nov 2007
Vehicle: '73 450SL, '83 300CD, '88 300SE
Location: Upstate Central NY
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If you look in the owners manual (or a supplement that came with the car, I forget which) you'll notice that in the list of acceptable fuels, it states that 10% 'gasohol' is ok. Gasohol was as term used to describe ethanol blended gasoline years ago.
So technically, MB says it's ok to use it.
I try to avoid it, just on principal. I want as close to 100% gasoline in my car as possible. There is a measurable negative change in fuel economy when using ethanol blended fuel.
The other thing is, alcohol absorbs water (that's what dry gas is) and water is the enemy of any fuel system.
Also, when sitting, the alcohol/water mixture will sink to the bottom of the tank. So if you have a car that you seldom drive, and it has a mixture of nasty stuff in it, it'll tend to sink to the bottom of the tank, which is where the fuel is picked up... not really good.
Think about it.. if it's a 10% blend, that would amount to 2 gallons of alcohol in 20 gallons of fuel.
ASE Master tech, specializing in electronics and driveability.
Certified Diesel Master tech.
EPA 609 certified
1973 450SL - 191K - Summer Toy
1978 300D - 267K
1978 300CD - drove to death
1981 300D - drove to death
1983 300CD -170K
1989 300SE 105K miles..
1981 Coupe DeVille.. just because.
... and many more past and present...
Because Safety is not a luxury. Mercedes-Benz. Engineered like no other car in the world.