You may talk to a MB specialist when you drop-off your car and then when it is rolled in the back a minimum wage hack actually turns the wrenches.

It is much easier to find someone to work on the older lower-tech cars. There is a good reason why people dump high-tech cars before the warranty period expires.

Be clear on the shop's policy for come-backs. What will they do if you pay a bunch of money and the problem is not fixed or if three other problems are created during the repair?