"Cadillac could offer a BLS station wagon (like the 9-3 SportWagon - see separate story) and even convertible, as yet, only a saloon has been confirmed."
Full article:
http://www.channel4.com/4car/feature/motorshows/geneva2005/production/cadillac-bls.html

I guess it is pretty wise to see what the BLS will do. It is all about marketing though. Europe has to be introduced to the new Cadillac. Nobody knows about Cadillac here...