1996 Mercury Mystique Owner's Manual - Page 216

If you do not let the engine relearn its idle, the idle quality of your vehicle may be adversely affected until the idle is relearned. Your vehicle will eventually relearn its idle while you drive it, but it takes much longer than if you use the previous procedure. Windshield Washer Fluid and Wipers Washer Fluid Check the level of the windshield washer fluid every time you stop for fuel. The reservoir for washer fluid is located on the passenger's side of the engine compartment. Visual inspection can determine if the washer fluid is adequate. Do not operate the washer when the reservoir is empty. The windshield washer fluid reservoir Adding washer fluid RWARNING Do not put windshield washer fluid in the container for the engine coolant. If sprayed to clean the glass, engine coolant or antifreeze could make it difficult to see through the windshield. 220