1. Euro Fogs. I did the simple mod for them. That's all the 2nd indicator on the right is..it's just showing the the rear fogs are on. 2. I suspect that many of the people having the DEF show up having been driving the car very hard, and as such, are using more than the usual amount of fluid. It definitely seems to be more common on the X5's, though. 3. I tried to order iDrive, but by the time I'd called my CA to have it added, I found out the car was already in paint, so it was too late, and I didn't really feel the need to re-order the car, even though I could have. Do I kick myself? Sure...there are situations I find most days where it would be helpful, and I might consider a retrofit, but for now, I live without it.