New to X5 - Few questions

[Jughead028]

Hi all,
We bought a 06 X5 (E53) in Feb. It is a 3.0D auto.

I have a few questions/issues.

1. The rear tires are wearing on the inside edge, which are nearly bald, while the outside edges are nearly new.
Is there any way of adjusting the camber?

2. My trip computer said fuel usage was 11.9 l/100km, but when I filled up and checked, it worked out to 12.6 l/100km. Is this a known issue? An adjustment needed?

3. I need to change the ATF. We have the ZF transmission, and although I have searched here and seen pictures of what my tranny should look like, I can't find the filler plug anywhere. My tranny looks different to the pictures on here. Our tranny has the plastic pan. Any suggestions of where to look?

Thanks for any advice.

JG