Great! Now I need to find out how to remove cd changer out of its housing. Will I get any error codes?

 

Or you could always buy this:
http://www.mcar.us/index.php/products
It goes in in-place of the CD changer.

 

Everything is out of stock. Screw their prices. I don't need all of that. Just Bluetooth streaming. I like your $75 solution. Nice and clean.

 

I was able to use the TranzIt BLU HF (http://isimple.com/catalog/install/ISFM2351) to get BT streaming through the radio in my 09 CLK550. Sound is great. Only downside is when you turn off the car, the BT turns off so you quickly hear the fuzz from the radio in the sec or 2 from when you turn off the car and when you pull out the key. Also, my tech hid the mic behind the rear view mirror.

My MB BT for answering phone call still works, but this product also works for the phone. I might sell my MB BT due to this duplication.

I couldn't install mcar bc I don't have the navigation COMMAND.