how do you remove the headliner from a 1999 mercury cougar
No.
Yes , the 1999 Mercury Cougar is FRONT wheel drive
It's a bit buried. Note that the 1999 Mercury Cougar has no user-servicable barts.
relay R1 is for the fuel pump on a 1999 Mercury Cougar
According to the 1999 Mercury Cougar Owner Guide : ( 58.5 litres / 15.4 U.S. gallons )
No, body parts on the 1999-2002 Mercury Cougar are not fully interchangeable with other vehicles, as they are specifically designed for that model. However, some components may be shared with other Ford or Mazda vehicles from the same era, given that the Cougar is based on the Ford CDW27 platform. It's essential to verify compatibility with specific parts to ensure proper fit and function.
The 1999 Mercury Cougar OBD 2 port is under driver side dash left of steering column
I was looking at the 1999 Mercury Cougar Owner Guide and it does not show that it has a gas cap warning light
According to the 1999 Mercury Cougar Owner Guide the six disc CD changer ( if equipped ) is located in the luggage compartment
The engine diagram for a 1999 Mercury Cougar is used in diagnosing and repairing problems. It gives the location of each component and its connection type.
Ebay, http://www.nextag.com/mercury-cougar-headlights/search-html, or just drive to your ford/mercury dealer.