ebay. its not an extended deville, but it was a dhs. i was thinking maybe it could be some kind of reclining switch, or maybe the up/down is for the seat belt adjustment.. im not sure what the < and> could be for though. this intrigues me. i might go up to frank kent(the local caddy dealership) tomorrow invesitage it further. lumbar inflation is a good guess as well. afaik the window shades are just an add on option.