Last week my sister took her Mercedes to the nearby MB dealership in Va. for a state inspection and oil change. She is retired and rarely drives it, so the miles are low.
It was "ready" several hours later than they had promised, plus her vehicle failed inspection. Among other items, they told her her brakes were worn out and her BATTERY would not pass! Car starts, charges and runs fine, btw. When she argued that her brakes were replaced last year, they said "not according to our records." She said, "That's right, I had them done somewhere else, not here."
She refused to let them do any "repairs" and asked for her bill. It was over $120 for an oil change and rejection.
The next day her husband took it to someone else and asked for an objective inspection. The brakes were within specs and the inspector said he had never heard of a battery causing a vehicle to fail state inspection. Nothing that was cited by the dealership was legit. It was all bogus to upsell my sister a bunch of stuff that she didn't need.
I advised her to contact MB of N. America and file a complaint. When I worked for them 20 years ago they would have taken action, maybe they still do.
I've worked for other dealers since, and this is very common. Franchise tire dealers do it, too. I've seen it. Even the "Good" ones will do it, shocks, struts and brakes.