The mechanics took care of the electrical problem on my Mercedes SLK that made one of the headlights quit working.
They told me how long it should take and had it ready just as promised.
There was another problem with the car but they let me know that they couldn't fix it which is just as important as fixing the other problem. They could have worked on it and "maybe" fixed it but instead they told me they couldn't and that saved me money. I really appreciated their honesty.