Your vehicle is fitted with air-assisted hydraulic brakes. What would warn you that there isn't enough air in the system? Your vehicle is fitted with air-assisted hydraulic brakes. What would warn you that there isn't enough air in the system?

• Possible answers:

   
• A. An increase in pressure on the air gauge
• B. A buzzer or light
• C. The exhaust brake won't work
• D. Brake fade