I'm happy with the work that's done on my car, but I have some suggestions related to customer service.
1. Please look your customers in the eye when they approach you. If you are typing on the computer when a customer approaches you at the counter, you can at least say, "It'll be a minute" rather than ignoring them.
2. When you do greet the customers to signal you're ready to help them, again, look them in the eye rather than continuing to look at the computer. We're human, not another machine in the garage.
3. Please don't insult other customers behind their back to other customers. If you talk negatively about customers to me, you'll do it about me to others.
4. When you discover what's wrong with the car, rather than just labeling the problem, explain it. The labeled problem is familiar to you, but it is not to most of the customers. We want to know why we're about to shell out $500, $1000, or more. If you can explain (not just label) exactly what the problem is, we're more likely to be confident in handing over the money to get the work done.
Following these few simple steps will improve relationships with customers remarkably.
Thank you for taking the time to read over this.