That is correct. The Curt T-Harness # C56391 is going to fit only the 2017 model of the VW Golf Alltrack. There is no plug-in T-harness available for the 2018 or 2019 models. For that reason we recommend using a hardwire kit like the Curt # C59496, or for a no-splice option the ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT for those model years. view full answer...