Go to car-part.com and enter year -model and parts that you are looking for
The thermostat on a 2004 Eddie Bauer Edition Explorer 4.6L V8 is located in the top heater hose. It is in the end that is attached to the water pump.
22.5 gallons ( 85 liters )
Albeit your question is extremely vague, I shall answer to a degree. My 2004 Eddie Bauer has heated seats in the front, both passenger and driver side. If you were to be more explicit in the question, as in model, but more specifically year the probability of receiving an answer would increase 99%.
Under the dash on the drivers side ( on the Ford Explorer )
106 liters ( 28 U.S. gallons )
Yes
Why not just look and see? ( 6 per wheel )
How do you find the factory set keyless entry code for a 2004 Eddie Bauer Explorer
OBD 2
Copy & Paste link below I now it's not a ford but it give you an idea on how and what to do. Regarding your heated seat repairs. Repairing the heated seats on a Range Rover ... Introduction Diagnostics Official Procedure Bypassing a Failed Seat Bottom Element o www.rangerovers.net/repairdetails/seats/seatheat.html
Usually 12-19 MPG, depending on condition of vehicle and driving conditions.
If you will purchase a Purolator Cabin Filter it comes with complete instructions including the location.