The # CSS-1094R Coil SumoSprings helper spring would indeed help reduce some of the minor sag caused by the tongue weight of a trailer being applied to the rear suspension of your Touareg. The product mounts in between the coils of your existing rear springs to provide additional support and dampening. They will also help reduce body roll experienced in turns. This is the only helper spring option we offer for your 2015 VW Touareg.
I'll link to a video that explains more about the Coil... view full answer...
The Rhino-Rack SX Series Legs for Vortex Aero Crossbars - Raised Factory Side Rails # RRSX022 are only available in the full quantity of four, and not sold individually or as a pair. view full answer...