Mercedes Benz Travel Alarm Clock "reset radio fitting new battery" Questions

...reset everything )...or try another new battery in it 2...If that fails, try disconnecting the Main Car Battery terminal for 10 minutes, then replace it. This often resets everything as well. Make ...

...battery puts the radio system in loc mode and if u dont have code u need to notify dealer also if u put in a wrong code to many times-- vehicle would have to be brought in to be reset by the ...