Buying a 23-24' RS etron GT, how to inspect the carbon ceramics?
I'm looking at a RS etron GT with 35k miles that has the carbon ceramic brake option. I know the rotors should last the lifetime if treated right. I've done some research and I should look at the wear dots, see if the surface is smooth, chips, bubling. Then with a test drive, if I notice if shudder, pulling, coarse grinding noise when braking and lack of bite at low speeds. Should I still pay the dealer to use their Proceq Carboteq laser tool to check the rotor and/or have a mobile PPI come can check the rotor condition? The dealer is already doing their own inspection of the underbody, batttery SOH, brake pad thickness, and tire depth. The dealer will probably charge $300 and the mobile mechanic another $200. Is this just overkill, should I do 1 or the other, or both?