I'm replacing my SLS air springs this morning, but its not clear to me where to jack the car up. The official jacking point is a notch on the rear suspension arm. This would seem to raise both the car and the axle. However, I suspect I need to be able to support the chassis and axle separately. So where to jack/support each one??

 

For others looking at the forum archives.

I ended up jacking it up at the end of the rear suspension arms and putting jack stands behind that. Then used the normal tire change jacking notches on the rear suspension arms to control the axle height. Worked fine for me.