The Rolling Stones
Richards' opening riff is an open-G part commonly associated with a Les Paul neck-pickup sound, although the exact session guitar and amplifier are not conclusively documented. Mick Taylor's extended outro was improvised on a Gibson ES-345 and developed into the song's Latin-influenced jam. Settings approximated from the likely Richards chain and Taylor's documented instrument. Source: Premier Guitar's Sticky Fingers lesson and Guitar World's Stones guitarist history.