Puddle under car
Also, it wasn't exactly leaking under the car. More like close to the front bumper. Hopefully not the heater core
When oil based fluids get wet with water it creates that rainbow effect. Judging by the location of the leak I'd say either power steering fluid or transmission fluid. Check both and see which one is low. HTH. -Jim
Looking for a Used Grand Marquis in your area?
CarGurus has 1,801 nationwide Grand Marquis listings starting at $500.
Search Mercury Grand Marquis Questions
Mercury Grand Marquis Experts