ES300 LEXUS-SMELL FROM HEATER

What year ES 300? Has any service or maintenance been performed lately? Does the smell come from only the floor vents or from the dashboard vents as well? Does the smell come whether the engine is running or not?

tHE SMELL COMES WHILE THE CAR IS RUNNING. aLSO IT SEEMS TO COME FROM THE TOP VENTS

I'll provide some newsgroup etiquette... Typing with your caps lock on denotes shouting so it is more polite to type using normal capitalization as necessary. Also, it is helpful if you do not delete previous relevant parts of the thread (discussion) so that people posting responses know what you are talking about.

Now, for some additional information: How old is the car? How many miles or kilometers on the odometer? Does the smell come when the car is moving or just when it is sitting still? Is the smell stronger in reverse or in forward or in neutral/park? Do all of the fan speeds on the heater blower work?