MERCEDES ELV REPAIR FOR DUMMIES

While in the immovilizer sistem I've look at this code : A22449- electronic ignition switch inner fault. Can this be a hundred% ezs trouble? Any response would be quite apreciate. Followup from the Pelican Workers:hello I'm acquiring the identical difficulty with my 2011 w204 [c300 sport 4matic] I altered the battery yesterday and drove the car fan