2010 Mercury Mariner Owner Guide 2nd Printing - Page 204

Tires, Wheels and Loading • To eliminate excessive shifting, use a lower gear. This will also assist in transmission cooling. For additional information, refer to Automatic transmission operation in the Driving chapter. • Anticipate stops and brake gradually. • Do not exceed the GCWR rating or transmission damage may occur. Servicing after towing If you tow a trailer for long distances, your vehicle will require more frequent service intervals. Refer to your scheduled maintenance information for more information. Trailer towing tips • The trailer tongue weight should be 10-15% of the loaded trailer weight. • Practice turning, stopping and backing-up before starting on a trip to get the feel of the vehicle-trailer combination. When turning, make wider turns so the trailer wheels will clear curbs and other obstacles. • Allow more distance for stopping with a trailer attached. • To aid in engine/transmission cooling and A/C efficiency during hot weather while stopped in traffic, place the gearshift lever in P (Park). • After you have traveled 50 miles (80 km), thoroughly check your hitch, electrical connections and trailer wheel lug nuts. • If you are driving down a long or steep hill, shift to a lower gear. Do not apply the brakes continuously, as they may overheat and become less effective. • Vehicles with trailers should not be parked on a grade. If you must park on a grade, place wheel chocks under the trailer's wheels. Launching or retrieving a boat Disconnect the wiring to the trailer before backing the trailer into the water. Reconnect the wiring to the trailer after the trailer is removed from the water. When backing down a ramp during boat launching or retrieval: • do not allow the static water level to rise above the bottom edge of the rear bumper. • do not allow waves to break higher than 6 in. (15 cm) above the bottom edge of the rear bumper. 204 2010 Mariner (mrn) Owners Guide, 2nd Printing USA (fus)