Well bought a car 2000 jaguar s-type

http://www.cardomain.com/ride/2941064

it has many electrical issues which i hope are all just a cause of one failure or something..

For example off hand it has.....passenger window wont go up or down and pass. side mirror wont move either. Dash won't light up. Headlights are always on i have to disconnect battery when i turn off car. Wipers only work intermittently almost never work though.

Mileage also only works intermittently the gauges work fine though.

the traction thing works but there's an S button next to the traction button that doesn't seem to work...

The battery drains but im guessing its because of the headlights that wont turn off.

The car was modified when it had lambo doors installed and i guess thats when the previous owner ****ed it up. I dont know though just had the car 3 weeks.

Anyone know if one computer controls all the above or so?

Thanks for any help