It's entirely possible to come downstairs one morning to find your car has suddenly gained a host of extra functions, improved menus, and occasionally, even better performance. (evo.co.uk)
If Your weight is small and You don't need extra functions, this option is perfect for You! (best-powertower.com)
Doing so greatly decreases the likelihood of the function but means you only have on extra function. (skepticalscience.com)