Final answer:
Access to the radio control submenu in the MFD Tuning window is commonly through the steering wheel controls or the center console, involving the radio volume knob or other dedicated buttons.
Step-by-step explanation:
The radio control submenu on the MFD Tuning window is typically accessed using the vehicle's interior steering wheel controls or through the center console. The MFD, or Multi-Function Display, is an interface that allows drivers to interact with various aspects of the vehicle's multimedia system. In many cars, features such as the radio volume can be adjusted using the radio volume knob located on the center console or via buttons on the steering wheel, which might include a cruise control button as well. Adjusting these settings while driving should always be done safely to avoid any distractions. It's essential to be familiar with your vehicle's layout, including the location of the gear shifter and the difference between window control and radio control options.