Several visits with a Jaguar XK8 2001. They charge a huge amount for a pretty muti-page "diagnostic report" which identifies a problem (example non-functioning windshield wiper solution spray) on one report and then the next visit identifies it as functioning normally despite the fact that we had not yet got around to repairing it. Really drives a stake into their credibility when they don't even identify a problem they were able to previously identify. By the way, when the problem was identified the recommended fix was a complete replacement of the windshield wiper assembly at almost a thousand dollars rather than what it really needed, a $100 hose.
The car made some high pitched noises during every visit we made for it. Gaudin had about 5 chances to figure out the problem. Each time, this was identified as "road noise" as opposed to the real problem which was completely disintegrating bearings in the wheel which near completely severed the connection from the wheel to the car. If we hadn't taken the car to another repair place, we would have lost the wheel, crashed the car, and, if at highway speeds, likely our lives.
Very poor communication, excessive "diagnostic fees" and misses critical problems which can result in catastrophic loss and risk to life. Being the dealer might make them have the appearance of skill and attention to detail but this is most certainly not the case. Do not have your vehicle serviced or repairs here if you value your safety or the safety of your family and friends.