After a brake light warning showed, my Audi was taken to Corpus Auto. Their auto diagnostic computer was malfunctioning, though I was assured the brake fluid levels were good and the brake pads adequate. I returned 2 weeks later (the earliest I could because of personal commitments) with the continued warning light showing, but they were too busy to check it at that time and requested that I return the next morning at 7:30 am. On this 3rd visit they did a thorough inspection of the brake system and found the only problem was a burned out brake light bulb which they replaced, and I was on my way. The warning light was no longer showing. I liked that they explained why they couldn't help at the present time but would in the future-and they did.