Originally Posted by ala_xfire

Most LIKELY cause is a vacuum leak somewhere.
Could be a dirty/faulty MAF sensor.

At any rate, the PTCM has detected a lean fuel condition, and is unhappy.

Try this :
Disconnect the negative ( black ) battery cable ( 10mm open end wrench ).
Wait 10 minutes, connect it back up.
See if the CEL clears, it may not come back.

If so, then :
1. find the vacuum leak ( lots of ways to do that, use search )
2. clean the MAF sensor ( use search )
3. replace the MAF sensor.

You should be able to drive short distances, but don't take my word on that.
Find a good independent MB type shop that doesn't mind working on a Crossfire.