Make sure no exhaust gasses are leaking into your car. Remember, carbon monoxide is odorless, as well as deadly.
Also, make sure you have good ventilation. I like to drive with the windows up and the air conditioning on and set on "recirculate." This is fine for short drives in the city because it keeps out exhaust fumes from deisel busses and other cars, but when you're on the road for longer periods, you have to remember to bring in a fresh oxygen supply.
Also, make sure you have good ventilation. I like to drive with the windows up and the air conditioning on and set on "recirculate." This is fine for short drives in the city because it keeps out exhaust fumes from deisel busses and other cars, but when you're on the road for longer periods, you have to remember to bring in a fresh oxygen supply.