Specific wiring harness for retrofitting a seat / rear seat heater for the following vehicles: Audi A4 8W (selection version 1) Audi A5 F5 (selection version 1) Audi Q5 FY (selection version 2) Easy commissioning in a minimum of time Required additional components: Seat heating regulator for rear seat (integrated in the air conditioning control unit) Rear seat with integrated heating elements Selectable options: version 1 version 2 Scope of delivery: cable set Note: only for vehicles with air conditioning plus (PR no.: 9AQ) Air conditioning exchange required