I honestly thought spirits that possessed a body would use their ears/eyes to perceive.
Spirits that possess vehicles and the like can use their sensors can't they?
Ok, got my Street magic book out...
on Pgs 102-103 sidebar (the white on black text)
It talks about a pessessed SAAB (a car), whiel the spirit could drive the car, it could NOT operate the sensors or any other electronic devices. The spirit can only interact with and operate/move the MECHANICAL parts of the car.
Also under Pg 86, to enchant the car, you need 1 radical reagent per 10 kg of mass of the vessel (so, depending on the car, it's mass is somewhere between 1800 to 3200 kg, or 180 to 320 reagents at a cost of $200 to $40,000 EACH!) and you may have to enchant seperate parts of the car seperately, which means taking it apart, enchanting, and then reassembling.
so, once again I say, "Talk to your GM" it's all up to him in the end!
**REASON FOR EDIT: actually took a second to look up how much cars weigh...
http://cars.lovetoknow.com/How_Much_Does_a_Car_Weigh