So far, I´m in level 19, with almost every event finished(except the extreme events and B-Spec), but I´ve never had any damage on my cars, other than a light scratch on my first car, a premium miata that I raced on monza, since I´ve never played on that track before, I accidentally hit the barrier on the first chicane. I hardly ever crash, but for what I´ve heard and seen on youtube, it takes alot to even make a scratch on any car. Now, for mechanical damage, is that really true? Did it really happened to someone already? And "unlocking" damage at certain level does not make any sense.
The damage itself does not make sense, specially for people who don´t crash. I don´t think I will be seeing any damage on my cars(and I´m personally not crashing them on purpose. I have GTA4 for that). It would be better to have an option to turn the damage on or off, and specially to set the intensity.