Audi Q5 Trailer Wiring | etrailer Best 2012 Audi Q5 Trailer Wiring Options. Speaker 1: Today, we'll be taking a look at the best wiring options for your 2012 Audi Q5. These are going to be the three best options when wiring your vehicle: the Tekonsha ZCI circuit protected vehicle wiring harness, part number 119250KIT, the Tekonsha upgraded heavy duty ModuLite circuit protected vehicle wiring harness, part number 119190KIT, and 2013 Audi Q5 Trailer Wiring | etrailer Fastest shipping available and a lowest price 2013 Audi Q5 trailer wiring guarantee. Expert lifetime technical support on all purchases. Complete 2013 Audi Q5 Trailer Wiring installation instructions and customer reviews. Call 800-298-8924 to place your order or order online at etrailer.