It's a separate option on the E39...the cold weather package just gets you heated seats and headlight washers. (BTW the heated steering wheel is a separate option as well, in case you were wondering.) In other words, if you are looking at used E39s, don't assume it has the fold-down seats just because it has the CWP. The fold-down seats came with the ski sack as well...this option cost about $475....the CWP was $600. Hope that helps.