Get the stored code read and you will know for sure instead of guessing. Some auto parts stores will loan you the scanner or scan it for free...ask around. Most shops will charge a nominal fee to read it (it does not have to be read by MB dealer).

These cars have lots of sensors and one of the common failures in the MAF sensor (Mass Air Flow) which is on the intake. Can intermittently be bad or stay bad. Just needs to be out of parameters to trigger the CEL, as do any of the sensors. They are not necessarily failed, just out of spec.

Still, you should have it checked to make sure.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz