Otobots, an Oak Brook-based mobile mechanic company, has been purchased by a Seattle company offering the same services. Wrench, which also provides online mechanics' services, paid an undisclosed amount to acquire Otobots. Both companies promised savings of mechanics performing services directly at the consumer's home, rather than at a dealership. "This acquisition accelerates our national expansion to deliver our goal of removing the hassle of owning and maintaining your car. We feel validated...