With my 1980 g230 I get less than 10 miles to the gallon. This is an approximation but I believe that I get about 8 miles to the gallon in the city. It's very poor but still fun to drive.
www.fueleconomy.gov
premium fuel only
Buy a Hayne's manual for the Mercedes diesel or a Chilton's manual for Mercedes (it has a 123 Mercedes on the cover). It will show you how to change the inline fuel filter and the main fuel filter.
Why does my fuel pump keep running on my 1984 190E
Take it to a mechanic
around 6.5 liter per km
By adjusting Mixture with Bosch KE3-Jetronic Mixture Adjustment
There are many highlights of the Mercedes Benz c280. This includes the four valve per cylinder straight 6 engine. It also has improved fuel consumption and reduced emissions.
The Blue Efficiency feature of Mercedes car makes it more environment friendly and more fuel efficient. This feature enables less fuel consumption and the cuts CO2 emissions by up to 20 % and pollutants by up to 80 %
The average fuel consumption of the 2006 Honda Accord is 10 km per liter of fuel. This includes in calculation the fuel consumption in crowded areas and the fuel consumption in regular areas.
No it does not affect fuel consumption.
It will not increase fuel consumption.