2009 Mercedes-Benz C-Class - Question on restarting a car

How much gas do it take to Start c300

put at least 5 gallons in. you do not want to run the vehicle really low on fuel.
The fuel keeps the fuel pump cool and from getting hot.

Is this person asking for the amount of fuel consumed by starting C300 ? If so why ?

Just to start it probably an ounce or less. I wouldn’t worry about it.