" 1. Volvo introduced the Generation IV coupling with the launch of model year 2009 with sale start late summer/early autumn 2008. So if you have bought a new car (model year 2011) it will be equipped with Generation IV
2. The eLSD addition to the Generation IV drastically improves traction, driving pleasure and safety of the vehicle. Unfortunately Volvo has not chosen to offer customers eLSD with their products.
3. Saab offer their vehicles with Generation IV, with or without eLSD, the name used for the system is however XWD in both cases. "
While the Haldex Generation 4 system will be made available to other automobile manufacturers starting 2009, the XWD moniker is a trademark owned by Saab Automobile AB, and thus cannot be used by any other make.