tbaleno-
al you probably already know, it all has to do with temperature. inside, outside, & engine. you and I are both in (currently cold) climates and I know that my auto stop operates alot more often when I have the fan/heat off than when I have it on even in econo. I think the engine is so effecient and little, that when you have the heat blasting it actually cools the engine enough that autostop won't kick in. I'll usually turn the heat/fan on to warm the car when I know I won't be stopping for a while, then turn the fan way down, or off if I get to a traffic section or lights.
I've had auto stop work when it's in the 20s out (even though the manual says it won't) if the heat is off (inside had already been warmed some during a highway run and car was up to temp). we also had 1 (and only one) warm day a couple weeks ago (50's) and the car was autostopping all over the place, and it was barely warmed up.
so back to your scenario - I think the other hch was warmed up, and yours wasn't quite ready. I think when it warms up a little more in chicago it will auto stop whether it's on (manual) fan or auto fan.
just my 2 cents from the whole 2 months I've been driving mine
and reading posts here and all over.
here's to it warming up soon. had to drive around in slush yesterday & today and watch my mpg go down
