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Reprogram spare key after battery change

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Old Mar 25, 2024 | 01:36 PM
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E Class Coupe CDI 2.2 W212 2011
Reprogram spare key after battery change

Mercedes C207 w212 2011 e class coupe

Needed to use my spare key which I know worked 3 years ago. Key does not work at all.

c
Changed Key battery same issue.

Does any one know how I can reprogram the key. TIA
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Old Mar 25, 2024 | 02:36 PM
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W212 MY'14 M276-3.5NA @75kMi
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Originally Posted by Tonyts
Mercedes C207 w212 2011 e class coupe

Needed to use my spare key which I know worked 3 years ago. Key does not work at all.

Changed Key battery same issue.

Does any one know how I can reprogram the key. TIA
Key programming does NOT get lost randomly from flat battery issues, car or fob.

Programming key registration is a licensed locksmith job that requires expensive tools.
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Old Mar 25, 2024 | 04:29 PM
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Have you tried inserting the key in the ignition?
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Old Mar 25, 2024 | 04:36 PM
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x2 on MB keys of last 20 years not being user-programmable.
In old cars, inserting key into ignition with switch to ON (no engine run) did work, so I guess it would not hurt to try, but don't hold your breath.
What country? In USA they are about 2 indies, who can handle key repair, when MB USA will force you to buy new key (who in most cases is not available due to Covid)
Do you get any light with new battery?

Last edited by kajtek1; Mar 25, 2024 at 04:41 PM.
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Old Mar 25, 2024 | 04:40 PM
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Originally Posted by kajtek1
x2 on MB keys of last 20 years not being user-programmable.
In old cars, inserting key into ignition with switch to ON (no engine run) did work, so I guess it would not hurt to try, but don't hold you breath.
What country? In USA they are about 2 indies, who can handle key repair, when MB USA will force you to buy new key (who in most cases is not available due to Covid)
My question was not about reprogramming but rather if it worked at all or was it just the remote functions.
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Old Mar 25, 2024 | 04:41 PM
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@Tonyts did you put the battery in correctly?
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