Question about 2007 Mercedes-Benz ML320 CDI

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Key fob will not reset after replacing battery

Kep fob to 01' ML320 will not lock or unlock doors after battery change or reset mode. It locked once and then will not do anything else. I have to manually lock doors from inside or lock.

Any suggestions. Thanks in advance

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Same problem. It was the AAM (All Activities Module).

Posted on Nov 29, 2012

  • rtodvine
    rtodvine Nov 29, 2012

    Same problem. It was the AAM (All Activities Module).

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Replace the key fob, please contact mercedes, who will supply u with a pre programmed key, it will save u a lot of aggro in the long run

Posted on Mar 02, 2009

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Key fob dont work, but door lock works ok, key fob battery change.


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Need to reset the key fob after replacing the battery


You should not have to reset the key fob after a battery replacement. The signal from the key fob stays the same and is programed to the reciever.
If the key fob needs to be reprogrammed then follow these steps.
1. Have all key fobs with you during programming.
2. Sit in the vehicle with all doors closed.
3. Lock all doors using the Lock/Unlock switch on the door.
4. Insert and withdraw the ignition key 7 to 9 times within 10 seconds (do not turn the key, just insert and withdraw).
5. The 4 way flasher indicator on the dash should flash once or twice.
6. Insert the ignition key and turn it on (key on, engine off).
7. Press any button on one remote and the 4 way flasher indicator on the dash should flash once.
8. If you have more key fobs to program use the Lock/Unlock button on the door to unlock the doors and then lock the doors.
9. Press any button on the next key fob and the 4 way flasher indicator on the dash should flash once.
10. Repeat if you have more key fobs. Only 5 can be programmed.
11. To exit, simply turn of the igniton and remove the ignition key.
12. Unlock the doors using the Lock/Unlock switch on the door and exit the vehicle.
13. Make sure the window is down when testing remotes in case you leave the keys inside.
14. Close all doors and test all remotes that were programmed.

Do not skip any steps or the process will not work.

If the 4 way flasher indicator does not work when inserting the key, you will need to start the process from the begining. If it still does not work the receiver may be your problem.

If the 4 way flasher indicator does not flash when pressing any button on the key fob then the key fob is the problem (dead battery or defective remote)

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