It’s not easy to sell convertibles in the rain. This was the challenge for Audi Canada as they attempted to increase test drives for their A3 Cabriolet convertible. How could they reach their customers in the most relevant context to sell more cars? They turned to the insights gleaned from their potential customers’ mobile devices. Audi launched a mobile ad campaign where customers could book test drives directly from the ad experience. These ads were targeted to people in close proximity to a dealership, prioritized via CRM data and displayed only on sunny days when they knew test drives would be more likely. By understanding the context of their customers’ lives through the clues they leave behind though their mobile devices, Audi increased test drives by 51% and drove $13M in new A3 Cabriolet sales.