You've parked for a short time in a town while you plan your route. What should you do while your vehicle is parked? You've parked for a short time in a town while you plan your route. What should you do while your vehicle is parked?

• Possible answers:

   
• A. Keep the engine running on tick-over
• B. Rev the engine occasionally to maintain air pressure
• C. Hold the engine at a fast tick-over to maintain air pressure
• D. Switch off the engine