Don't panic if you see your check engine light on. It could be due to a number of reasons. Mercedes-Benz of Ontario covers some common reasons your check engine light may be on.. How to diagnose Mercedes-Benz Check Engine Light (CEL) problems. Is your check engine light on? Is it flashing? Did the check engine light come on while driving? Don't panic.
What to Do if Your Mercedes-Benz Check Engine Light Comes On No matter the situation, when the check engine light comes on in your Mercedes-Benz, we always suggest stopping by our service center so one of our knowledgeable technicians can properly diagnose and repair your vehicle.. The check engine light on your Mercedes-Benz is part of the onboard diagnostics (OBD) system, designed to monitor engine performance and emissions. When this light illuminates, the car has detected a potential issue requiring attention.