I found Dan by doing an Internet search for mobile auto repair in Phoenix. I wanted prompt service and I drove my Lincoln Navigator to his home. I needed a suspension compressor installed. On this vehicle, the compressor pumps up the air shocks at the back of the truck. Dan installed the new compressor and nothing worked. To make a long story short, Dan discovered that the pump manufacturer had omitted a small part, preventing the pump from working. Dan is a good diagnostics mechanic and he works until the job is completed perfectly. Dan's fees are very, very fair. I gave him a little extra for his skill in finding the problem. Thanks, Dan.