Two strikes and you are out!!! Audi Chandler's service department has twice now misdiagnosed my vehicle. The first time this happened I was leaking coolant and was told that my current expansion tank / reservoir was the cause of the leak. It was recommended that I replace the expansion tank. I took the recommendations of the Audi certified mechanics and had them do this work. After the work was completed, I drove off of the lot, got home, and noticed that I still had a coolant leak. I took my car back in only to discover that it was a lower hose that was leaking the coolant. I complained to the service manager. Since I had paid for the wrong work to be done, I was offered a deal...pay for the parts and the labor would be free. I did just that. Sure enough, no more coolant leak. Fast forward now 5 months later, low and behold, I am leaking coolant again. Since the work that was performed on my car was under warranty, I took my car to Audi Chandler to have them check to see if the work they had done was the cause of the coolant leak. I was informed by them that in fact it was not any of the work that they had done, but was a new leak in the oil cooler hoses. They quoted me roughly $1000 dollars to have the work done for the hoses and a new oil cooler (they gave me some definition as to why I would need a new oil cooler, all lies by the way) plus labor. I told them thanks but no thanks and they still charged me $100 for this diagnoses. Again, diagnoses was WRONG! I had a mechanic take a look at my car for a second opinion and low and behold the reason for my coolant leak was a $9 hose that I purchased and replaced myself from my local Auto Parts store. The only time I would use this dealership for service would be if my car was still under warranty and the work / service would be covered under that. Do not use this dealerships service department. They are incompetent and just plain wrong in their diagnosis.