On my 98 S70, on the top of the dash by the windshield is a small module with a red led that flashes to indicate the alarm is active. There is another "sensor" on that small module, anyone know what it is? Could it be a receiver for the keyless entry?

Also, to the right of the defroster button, is the spot that looks like another button would fit, is something that looks like a small vent, any ideas what that is?

Thanks
Mad Finn