I do believe that the writer of the article knows a thing or two about MB. This is from his website.
Tom worked for Mercedes-Benz for 25 years as a Technician, Instructor, and Service Manager. As the Service Manager for dealership’s in Houston and Sacramento, he received Mercedes-Benz “Service Manager of the Year” award 5 times. After opening his own Mercedes-Benz service center 23 years ago, Sacramento Magazine honored Stephens Service Center with “The Best of Sacramento”.