AC and heat are acting eratically. took to dealer, said I need new CCM would be $1300.00. I asked them about a used unit, they said they would look into it, they never did. My first question is can a CCM from another 06 s60 work in my car?

 

i had a similar problem with my 2004 s60. if you dig under the dashboard and behind the glove box, you will be able to take apart the entire blower assembly. there is a plate with a bunch of circuits and transistors attached to the blower assembly. that is usually where the problem is. you can find a used one on ebay for around $60.00 (!!!). this is what i did, and it works just fine. just look for "blower motor", because the parts stores usually don't separate them.
Let me know if this helps, or if you need pics of the thing. it looks like a metallic half labyrinth.
Oh, good opportunity to change the cabin air filter while you're at it