My AC is not blowing cold air. The following may or may not be a related issue: The coolant tank is low (picture below). The manual says that it needs special formula coolant. The cap indicates that this is not a user appropriate issue. Really? Is this coolant available for consumer purchase? Seems unfortunate that have to take the car in just to have the coolant topped off. Is there something I'm missing here? Any suggestions on the AC issue would also be appreciated. Thanks!