Where is the ac drain tube for mercury grand marquis?

The AC drain tube for a Mercury Grand Marquis is typically located on the passenger side of the vehicle, near the firewall. It is a small rubber or plastic tube that allows condensation from the air conditioning system to drain outside the car. You can usually spot it protruding from the bottom of the vehicle under the engine compartment. If you're having issues with water accumulation inside the car, it may be worth checking this tube for blockages or leaks.