I took my 2002 E320 to Doctor Benz a few months ago. I had a faulty sensor and a brake issue. He repaired both in about 2 hours and did it at a very fair price, much less than the dealership. Then, the sensor light came on again. I called Marco and he said that the factory part he installed may have been defective. I brought the car to him once more, he replaced the sensor again, while I waited a short time and did the second install at no charge. He's honest and fair and I would and will visit Doctor Benz again for repair work on either of my Mercedes.