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Home >> Mercedes Benz >> 1971 >> 280SL Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> Evaporative Emissions System >> Description & Operation >> Compensating Tank
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Compensating Tank

This tank is mounted in the trunk compartment above the main fuel tank and serves as an overflow tank (for expanded fuel caused by high ambient temperatures) and a separator tank to prevent liquid fuel from entering the vent line to the engine. Liquid fuel will be returned to the main fuel tank through the combination vent and return line. A breathing line from the top of the compensating tank is connected to the valve assembly.