Key switch - so yes change parameter 39 to setting 2 to lock out the parameters.
What configuration info do you need to know?
When the parameters are in an unlocked state its only the driver speed / braking settings that can be changed - the machine specific set up cannot be accessed / changed without a BT CAN key or BT Truck Com.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.