^ You need the M Performance Seats or the Sportsters and harness from AMX Max to plug right in and retain your oem heated seat button, I believe.
I am not sure how the standard Recaro heaters plug in, but they have a dual stage element with a button on the base/bracket of the seat if you go this route. Bump for confirmation. I don’t have factory heated seats but would like heated Sportsters, so I’m also wondering how the heaters would get juice.