To ensure the option, take a look at this.
http://www.kindel.com/Porsche/options.asp
Also, I would see if there are wires simply disconnected and ready for hookup under the ashtray module. Take the actual metal tray out and there should be a couple torxbits you need to remove to get the rest of it out.
I learned this when I converted mine to the non-smoker version. Once you get it apart, and if you have wires, then purchase a couple switches and connect them.