ob2s

Today my wife almost hit the car in front of her because sport mode came on without her knowing it, since sport turns the accelerator into a hair trigger. It happens every time it (2010 e550 coupe) is driven. Pressing the button to turn off does nothing. Any idea why this would happen, it sure seems like there should be a safety mechanism to keep that from happening. Any ideas ?
Thanks

Plutoe

You obviously have a fault---get a scan!