Wife called: "Aaargh! The car would not stop; it accelerated when I put on the brake!" So she shut it off and left it in the street. When I looked at the 940, it was immediately apparent that when she had entered wearing her boots, she somehow shifted the snow tray so that the back flap was in front of the pedals: when she pushed on the brake, the plastic flap also pushed on the accelerator. So make your significant others aware that this can happen and that the snow tray should be square in the footwell recess. I also cut off part of the flap to reduce the probability of this recurring.
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See the 700/900 FAQ at the select shortcut button on the top right of the screen.