[PAX5]

On the e70 X5, outer edge tire wear is due to one thing, and one thing only: excessive toe-in.

As noted above, camber is not adjustable, but if outside BMW spec, a repair/replacement of suspension components is covered under warranty.

Get the alignment right. Don't just drop the car off at you favorite BMW dealer and say "alignment please". An alignment will be performed and will be within the BMW specifications, but since that spec is sooo wide, you'll end up with the same problem. Tell them that you want the toe-in to be near zero, but not quite zero. Experience has shown that a value of 0.02 will give you optimal tire wear.

But there-in also lies the problem: you need to find a tech who is willing to take the time to play with the adjustment(s) until he gets a reading of 0.02, and no drift!

BTW, any competent shop can do such an alignment at a fraction of the cost BMW dealers charge ...