NEVER USE KATH GRUPPE! My Passat St. car (2.8l V6) had a new engine installed by Kath in Flensburg. As you can imagine, this is a very costly operation. However, this new engine used close to 1 liter of engine oil pr 1000 km. After complaining several times during the following year, I was told this is within the specifications - and even had to pay for the investigation made by Kath. Three weeks after the waranty expired, the engine broke down (missing compression) and Kath would NOT do anything about it. During the troubleshooting they even destroyed the starter motor - which I also had to pay for. They even claimed that was the problem and the problem was now fixed which was not true. Missing compression has nothing to do about the starter motor. And of course, the car did not drive when we should pick it up after the "repair". There was nothing to do: "Pay for the starter or you will not get your car back!". Therefore, we stood with an unusable car without a functional engine.
The staff is very unfriendly and sometimes even rude. Please, NEVER use Kath!
After four visits to Kath in Flensburg I can without any doubt claim that this is the place of the poorest mechanics and service-level I have ever experienced (and I’ve tried a lot). At first everything seems nice and they treat you well. However when they are to do the job it all falls down. All four times I’ve visiting Kath in Flensburg the mechanics has “forgotten” to fix the error, ordered home wrong parts, been unable to fix the problem or they say that they've fixed it only for me to experience that the error has not been fixed at all. All this while they know I’m driving 300 KM to get there each time, and I’ve made it clear in advance that it’s very important that they are able and ready to fix all the discussed items of that reason.
Already shaken by the incompetence described above you can also look forward to an insulting level of service from Kath Auto Gruppe, when you point out these errors to them. They have no care what so ever for you and your car, when the payment has been completed, and they deny any kind of help/refund even though it's clear that they haven't even been close to do their job right.
I have tried to reach out to them several times before writing this review.
My advice would be to choose all other places to get your car repaired than at Kath Gruppe - this is one big scam if you ask me.