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Malt It wasn't one shady dealer. It was ALL of them. The ecu problem? Mercedes. The Dimming mirror? Lexus. Wrong oil filter and double washers on the oil drain bolt? Infiniti. You'd think the premium brands offer better service, but from my experience, they don't, they just have free coffee and snacks.
Caught for what? Who is going to pursue me? My car is bone stock

I am not telling him to take off whatever broke his car if that indeed happen.
I am telling him it is best to keep your car stock if you plan to do any warranty claim. It's a game and it's up to you to decide how you want to play it. My personal experiences have not been good, so IF I were to take my car in for any kind of warranty work. I would make sure to take off my exhaust so that someone can NOT wrongfully misinterpret it as the cause of the knock.
If a turbo blew my engine, I wouldn't take it in, I'd just take the loss.
Warranty claim problems are not from people modding their cars are trying to defraud the system. Less than 1% of people even mod their cars(this car is different). It's from people not maintaining their cars and continue driving when check engine lights come on, or noises present themselves. I have a friend who has a kia, I ask him, when was the last time you've changed your oil? "I don't care, it has a 100k warranty."