Although you don't appear to be able to get straight into it, try selecting another car, say 3 series, then going to "build my car" and then choose Z4 once you get into the Java configurator that way.
Couldn't see the adaptive suspension anywhere, maybe not available straight away :idunno:
This link might work
Couldn't see the adaptive suspension anywhere, maybe not available straight away :idunno:
This link might work