Jimmy's Luxury Cars was a used auto dealer located in Miami, Florida. On February 15, 2005, Jimmy's sold a 1995 Mercedes Benz with 126,000 miles to Marty for $17,546. Jimmy, the owner of the business, had driven the Mercedes as his personal vehicle for two years prior to selling it to Marty. He tells Marty during negotiations that the Mercedes has been "the best car he's ever driven." During his ownership, Jimmy had a few problems with the car's air conditioner, but he hadn't had any issues in recent months. When Marty tries to use the air conditioner two months later, in April 2005, it does not function at all. A trip to a mechanic discovers that one of Jimmy's prior repairs will complicate the resolution of the air conditioner's problem, costing about $3,500. Marty asks Jimmy to pay for the repairs, but he refuses. In a claim for the repair costs, what theory of warranty would best support Marty's case?