Auto Audits Inc

Bought a Mercedes from them in the winter. Tested it- drove well. Checked heat, radio, etc. we get inside to seal the deal and I realize we didn't try the air. The guy says- oh, it's cold it'll blow cold air. I ask does it work, do they know? He assures me it does. Guess what?! Come summer... Broken. Try to contact them- never answer or call back. Buyer beware. Shady place. May want to use as last resort. Definitely will never purchase from again.