Gas tank overpressue followed by fumes

[JohnC]

My wife was filling up our 2001 E320. When she removed the hose, gas burst out of the filler tube, she says it seemed like a gallon though I doubt it. It's as though the tank had been pressurized by a faulty cut off valve on the gas pump (we're in CA with a tight seal vapor recovery system on gas pumps). A gas odor followed, not surprisingly. Three days later, the yellow low fuel light starts to blink rapidly on the gas gauge and she smells gas. We're headed for a dealer next week, but anyone have thoughts on whether this is a dangerous condition? Thanks