You could go to the dealer, wander around to the garage where the mechanics actually are, and talk to one of them. They’ll know much more about your car than the guy who answers the phone. Just try to catch one when he’s out having a smoke break or something, and BS’ing with a buddy. When they’re working, unless it’s your car, he’s earning his money, and taking him from his work costs him time. The service manager is also smarter then the service writers, and you could ask for him/her.
I do that, but only when they’re got my vehicle in there for something else (I get lazy once in a while). If they’re working on my car, I’m happy to watch, BS with them, and ask an occasional question (and learn in the process). I’m also careful to keep out of their way. It’s still their time, not mine.
Chase