This has actually happened to me.
Car had been parked all day in works car park. When I flashed my key to get in, the &*^%$£ horn went off, couldnt shut it off for love nor money, eventually it stopped when it burnt itself out.
Visit to the monkeys who put in a new horn!
Go out for a meal with hubby. Flashed key to get into car and the $£%* horn goes off again, hubby took the battery terminal off, and horn stopped.
Another visit to the monkeys who did a software upgrade.
Go for the recall, its dead embarrassing when the horn wont shut up!
