Check to make sure that your PTU Unit isn't leaking. Bring to the dealer. The smell recently happened in my 08 AWD edge limited and The smell was unbearable. You'll find this happens whenever you drive for a while and stop at a light or to pick someone up. The heater brings in the smell from the leaking PTU unit spraying onto the exhaust. When your driving the smell doesn't go up the engine as the PTU unit is directly below it. When you stop however, the unit sprays on the exhaust and the fumes get sucked up into your heater and into your car. I JUST HAD THIS DONE, and if you check the forums, its VERY common. Hopefully the new seal on the PTU unit stays and this doesn't happen again.
GOOD LUCK!
And otherwise I love my edge.
