The XWD system debuted on the 2008 limited edition Saab Turbo X , equipped with an electronically controlled limited slip differential ( eLSD ) .
The XWD system was gradually made available through the rest of the 9 - 3 line ( in sedan and combi body styles ) .
The XWD system debuted on the 2008 limited edition Saab Turbo X , equipped with an electronically controlled limited slip differential ( eLSD ) and was gradually made available through the rest of the 9 - 3 line ( in sedan and combi body styles ) .