Hendrick Volkswagen Frisco

Took in my wife’s CPO 2017 Tiguan on May 8, 2021 for an oil change and for them to look at the roof visor that stopped working. Not being aware of the fact that her car was a Certified pre owned I was told if would cost 170 dollars just to diagnose the issue with the visor. I reluctantly agreed and about 20 minutes later I told them to stop as I changed my mind. They tried to charge me 85 dollars just for their 15-20 minutes of “work”. I said i will not pay that and just do the oil change. When the oil change was done I was told my my service advisor Josh Cienfuegos that “FYI since the vehicle is a certified pre owned you would not be charged the 170 dollar Diagnostic fee and also you would only be responsible for a 50 dollar deductible if you would have not changed your mind!!! I don’t get much time to come to the dealership but that was a total waste of time as my intention was to get it fixed but for whatever reason (dishonesty, just not knowing any better) I don’t get Done what I needed to. He offered no apology as he was probably “hurt” that i didn’t let him scam me. How hard is it to look at that information before giving a quote??? I had issues with them last year when I took the car in for an oil change as well. Makes me want to look back at the invoice and see if they overcharged me then. Total joke and again no apology or nothing/ he just said it very casually. Wouldn’t recommend going here. Waste of time and overpriced vehicles and of course they try and pull a fast one on you.