Hi folks, just wondering if anyone is familiar with the hot air system or has experienced the same problem as me. Here are the symptoms of the problem: When I turn the hot air on after starting the car the first minute or so is full of fumes, which seem to me to be exhaust fumes. It doesn't matter how long you drive the car before you turn the hot air on. It could 1min after starting up or 10mins. When you turn the cold air on no fumes out. Has anyone experienced this problem? Is anyone familiar with the heating system? How is the air heated? Where could there potentially be a leak? Is there any diagrams of the heating system out there? Any help appreciated.