I recently bought a 2009 C300 and my AC regulator is bad. I found a new one online for $150 less than the dealer was charging, but I have no clue where it is located to change it. I cant find any site that shows it's location either. can anyone help me please?

 

Climate control blower motor regulator?

 

yes, Climate control regulator. I took it to the dealer to fix it but my manufacturer warranty was up by 20 days. told me the problem and said it would cost $650 to fix. I am an electrician and have a background in doing things like this but I need to locate it first. I know its around the firewall on the passenger side, just can't find it and don't wanna start dismantling everything to find it