The MCI D Coach has a different type of braking system called a DD3 Brake system. This system requires a full brake application before the vehicle parking brake will release. Please watch the associated video for details. As a side note, this process can be used as a habit to ensure brakes are always properly released across manufacturers and types.
This course has been added to your monthly refresher selection for the month, please complete the associated QUIZ as soon as you can!