First, check that you have fuel in the gas tank.
In Mercedes-Benz Model Year Vehicles later than 1997, an empty gas tank will prompt the vehicle to switch to "limp home" (emergency operations) mode. Once you refill the fuel tank, turn off and restart the engine three or four times to cancel the "limp home" mode.
Next, check the fuel cap.
It should screw on freely until you hear it click. If that was the problem, the check engine light should go off after a few starts. If the light does not go off, bring your car as soon as possible to Alex Rodriguez for an inspection. We use an onboard diagnostic connector to link to your vehicle to our service center's diagnostic system. The result: an accurate assessment of your vehicle.
The check engine light may illuminate as a result of several things:
A loss of pressure in the fuel system, a leaky fuel system, or a malfunction in the fuel management system, the ignition system or emission control system. It can also illuminate if there is no fuel in the gas tank. No matter what the diagnosis, you can rest assured that our highly trained specialists will provide the highest quality care and service to your vehicle.