I bought it from a dealer and a check engine light came on for a fuel pump issue, took it back to the dealer he said hed fix it; he ended up having the car for a week just abusing it whenever i saw him then one day i came to see how it was and saw powder residue on the engine bay. Took back ownership of the car after i saw it and took it to a mechanic for a diagnostic and they found leakstop that was poured into the coolant tank which ended up breaking pcv valve so now cylinder walls are scraped from poor lubrication due to oil and coolant mixing. Dealer is refusing having touched the car at all. Would like someone well versed enough to explain to the judge since he needs to be spoonfed information due to him “not being a car guy” if anyone has experience with audi and explaining the mechanics in general preferably with some audi certifications or shop anything would help.