The skills of Karl-Heinz were brought to my attention 4 years ago by a fellow German car enthusiast. A Mercedes aficionado, Karl is the only person whom I trust to look after my 2001 SL600 and maintain it in "as new" condition. That vehicle probably performs better now than when I acquired it 10 years ago. What Karl doesn't know about Mercedes, and about BMW's apparently is not worth knowing. Nothing happens to my car without Karl's Blessing.