Simultaneous operation of accelerator and brake pedals (MSV70): Effect
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
As long as the driver's demand and brake pressure are present, the vehicle does as follows:
The engine management system reduces the driver's demand relative to the brake pressure. If the brake pressure increases, the driver's demand is taken back accordingly by the engine management system.
Perceivable effects: like taking foot off accelerator pedal