I have seen 1.x was able to program key, customize telescoping, door lock, window and sunroof settings.
The 1.x cable I own was able to program my key, disable my DRLs, and stop that annoying auto-telescope wheel from activating. I have a 01LX that doesn't have TPMS, and I have read multiple places that the V1.x cables don't allow TPMS manipulation.
I think for SURE the 200 series would benefit from the V2.x cable. On the Hundys, it is perhaps only a benefit for those folks with TPMS and maybe some more advanced key programming requirements?
Ah, ok, good info. This makes me think the 06-07s might be different then. With my 1.X cable I was able to program the customization features, but not able to "register" things like new keys or TPMS. With a 2.X firmware cable it all worked.
In that case, maybe the cable firmware 2.X is only meaningful for the 06+ crowd.