Mazda 2012 CX-9 Owner's Manual page 167

Before Driving Your Mazda
Towing
3. Release the parking brake (also the foot brake) and pull away from the wheel blocks.
Stop; apply the parking brake and shift into P.
4. Have a helper retrieve the wheel blocks.
Fuel consumption
Trailer towing causes higher fuel consumption.
Maintenance
If you tow a trailer frequently, have your vehicle serviced as shown in Scheduled
Maintenance (page 8-3).
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