Mine has the "cold weather package" I have a Ski/snowboard bag that goes threw the center arm rest in the back. It has a water proof bag that folds up.
That way you can still fit 2 people in the back seat & carry gear.

 

2k S4, so thats the option "ski bag" is... now I know, man, I thought this car was too good to be true, now I must be dreaming... Now I can probably do that 4 hour VT trip in 2!

 

Yeah, that too, I don't have that because mine was originally purchased in San Fran and I doubt there was the need to spend the extra money on the cold weather package.