1996 Mercury Grand Marquis Owner's Manual - Page 268

Cleaning the Wheels Wash the wheels with the same detergent you use to wash your vehicle's body. Do not use acid-based wheel cleaners, steel wool, abrasives, fuel, or strong detergents. These substances will damage protective coatings. Use tar and road oil remover to remove grease and tar. NOTE: Before going to a car wash, find out if the brushes are abrasive. Automatic Transmission Fluid Under normal circumstances, you do not need to check the fluid level of the transmission, since your vehicle does not use up transmission fluid. Refer to the Maintenance Schedule and Record booklet for replacement intervals. However, if the transmission is not working properly - for instance, the transmission may slip or shift slowly, or you may notice some sign of fluid leakage - the fluid level should be checked. Checking the Automatic Transmission Fluid It is preferable to check the transmission fluid level at normal operating temperature 150˚F-170˚F (66˚C-77˚C), after approximately 20 miles (30 km) of driving. However, if necessary, you can check the fluid level without having to drive 20 miles (30 km) to obtain a normal operating temperature if outside temperatures are above 50˚F (10˚C). With the vehicle on a level surface, start the engine and, while fully applying the brake pedal, move the transmission shift selector through all of the gear ranges allowing sufficient time for each position to engage. Securely latch the transmission shift selector in the P (Park) position, fully set the parking brake and leave the engine running. 266