Driving home from work today and got this really overpowering smell in the car coming from the airconditioning vents. Opened the front windows and then blasted the fan onto full and out comes some smoke that partially fogged up the windscreen just above the outlet. The settings were on as cold can be (without the air con actually being turned on).

I did previously have a problem with the smell in the car, but not that overpowering and not with smoke. had taken it to a mechanic who at the time fixed the heater (pipes were clogged), but didn't fix the smell that was sometimes noticeable in the car. Assumed the smell came from the air-con gas but what could the cause of the smoke be? I need help here!!! and some sort of suggestion on how to fix it, or a good mechanic who actually knows what to do!

__________________
Speed doesn't kill. Suddenly becoming stationary does!