Choosing Car Repair Shops

As Administrative Head of the company I have many things at hand in the office. I realized that even if transactions are few I always have something to work for like cars in trouble where I have to get quotations from 2-3 shops to compare and pick not just the most affordable costing but also choose quality service as well. When the aircon of my manager’s service car malfunctioned it took me more than 2 weeks to have the quotation from the lowest quote to be approved. As I’m not familiar with car aircon and car maintenance itself I have to read and read and understand how different quotations vary not only in price but in parts to be replaced. Isn’t it conflicting? Two of the shops I requested quotation from have two different findings and therefore we’re at a lost what the real trouble is. The solution agreed upon is to have it diagnosed and assessed by its maker, Toyota itself, so we’ll base our decision on their report.