Ive got a Sony CDX-M730 I bought of eBay from the US. I also got the stalk/remote diplay (DRNS002) from Connects2UK. Display works fine with the head unit because of the Sony Bus-System, but the stalk doesnt. Its because my Sony head unit doesnt have the 3.5mm input jack for the Sony Wired-Remote. So make sure your head unit does have this.
By the way, does anyone in Europe have the Sony CDX-M730? If so, can you tell me if yours does or does not have the 3.5mm input jack. Connect2Uk claim that all Sony head units do have it, but I think theyre Bull Sh!tting me. =/