General Motors recall number 11029 involves 50,000 model year 2009-2010 Cadillac CTS vehicles, 11,147 of which are in the U.S., that may experience an inboard or outboard turning of the rear wheel. No, this is not an extra feature, but rather an crash risk not to be taken lightly.
http://gmauthority.com/blog/2011/02/cadillac-recalls-50000-cts-models-rear-suspension-flaw/
http://gmauthority.com/blog/2011/02/cadillac-recalls-50000-cts-models-rear-suspension-flaw/