$700 later, my a/c is working but my blower fan sounds like it's about to take off. This loud hum noise is very annoying. I think the independent bmw mechanic used some after market part. I think i'm going to have to go back and have him replace the blower motor.
they showed me where it was located and how hard it was to replace it. They said the location of the blower motor is smaller than the unit itself. anyhow, it's a pain to put in but possible.
the 318i blower motor is located under the hood by the firewall. in order to get to it,you would have to remove the airvent to get to it. the airvent is located behind the engine. i hope this helps. I would be more detail but i don't know what some of these locations are called.