key does not turn in ignition on 2002 Mercedes-Benz C240

two days prior wiper,indicator light and high beam stated coming on for a few seconds intermittently,this was followed by having to make atleast two attempts to start car.finally after trying to start on day two, the key could not turn in the ignition. doors were able to open and the spare key did not work either

Asked by for the 2002 Mercedes-Benz C240
when you put in the electronic key, you should hear a
click from the EIS. if it does not click, either you have
a defective EIS or key or the battery is weak. this is not anything you can fix without MB software.