I'm siding with trent and G-Man,
The risk factor is a non-issue, with thousands of fill-ups a day across this nation * 15 years and only 1 incident? Better to do what you want.
Besides, the colder the outside temp is, the more comfortable the interior is with the engine running and the heater on and music. Besides, I'm usually sitting IN my car during the refueling, in comfort.
Thats what the spring loaded lever clip is for!
96 C280, Greenish Black