Question Details

just bought car everything worked shut it off n went to leave n key wont turn bought new kkey from dealer key worked locks n lights put in ignition and computing data please wait come up waited forever teied to turn key then it said remove so i did put it back in and wont turn again nor locks dont work n loghts dont flash bought new car battery and cr2025 for key fob and still same wont turn please help thank you

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MBFanatic  1 year 4 months ago

Connect a backup 12 volt power supply to the battery. Insert the key in the ignition and let it sit for a few hours. I am not kidding. Go back and your key should be good to go. Have had that happened on a S class. Had to leave key in the ignition all night. Again make sure to connect a 12 volt to feed the battery or the car battery will die.

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