The light is probably on for a reason. Could be a bad sensor. Please contact me if you would like to bring the vehicle by for us to look at. I work at Mercedes Benz of Ft Lauderdale. My contact # is 954-713-1049 and my name is Jonathan.
RepairPal Certified shops can diagnose and repair your 2002 Mercedes-Benz CLK320. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Thank u for ur help.
Would you like to come in and have it checked out?