AC system smells of solvent!!!! E500

Hi All,
Heres a wierd one: I just changed (myself) the front brakes and flushed the brake fluid.
Everything works (or appears to) fine. However, since completion of the work, when I first start the car, the AC, whether cooling or heating, releases air which smells pungent, almost of Liquid Wrench.
Before the work, the AC was fine. Dont know how/ why AC and brake systems might share anything in common, but do know that the AC smells funny. Come to think of it, I did not remove the grey coating on the rotors at the time of the brake disc installation. At first I thought the smell might be of the pads burning off the coating.
Any thoughts? Thanks in advance
farrukh