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2006 C350 key wont turn in ignition, alarm randomly goes off

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Old 02-12-2018, 02:31 AM
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C350 4MATIC
Exclamation 2006 C350 key wont turn in ignition, alarm randomly goes off

Hello all, my 2006 MB C350 was just driving fine yesterday. I go to put the key in the ignition, and it wont turn. The electronic key does unlock and lock the doors. A few hours ago I tried it again, and the key turned and started the car. But tested it a 2nd time an hour later and again it doesnt turn or sense the key.

Could it be my key? The EIS (Electronic Ignition Switch), the battery in my car? I am lost at this point and dont quite know what to do as this is my first car with an electronic key like this.
to add, i saw outside my fog lights were flashing on and off, so im assuming it was my alarm going off, yet with no horn.
Old 02-12-2018, 07:47 PM
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Yes it could be any one of the three items you commented on,however without the diagnostic tools you can only check the battery---the key and EIS are checked with DAS Xentry

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