2007 Alfa Romeo 159 • 4 cylinder FWD Manual • 26,000 miles

When I turned the ignition off on my Alfa Romeo 159 last night a motor kept running on the car, sounding like in the middle rather than under the bonnet. The battery was run down this morning and having just jump started it now the same thing was happening. Any idea what it is and how to stop it?
December 12, 2010.

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