C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

how to replace/program ignition switch?

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Old Oct 12, 2025 | 09:28 PM
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anarky321's Avatar
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2007 R320
how to replace/program ignition switch?

having an issue where you put the key in and the ignition switch is locked/not clicking....if i pull a junkyard part I can program it to fit my vehicle?

2001 E320 Mercedes Benz
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Old Oct 13, 2025 | 09:45 AM
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W209, W124
You need to determine if issue is EIS or ESL. Separate parts that work together. And 204 is prone to ESL issues
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Old Oct 13, 2025 | 11:10 AM
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W204 C250 Sport (AMG Package with Pano Roof)
Originally Posted by anarky321
having an issue where you put the key in and the ignition switch is locked/not clicking....if i pull a junkyard part I can program it to fit my vehicle?

2001 E320 Mercedes Benz
You probably need to remove the ESL and replace with an emulator. You will need to send the ignition switch and let away for programming.
If the ESL has failed in the unlocked position then disconnect the battery. If the steering column is locked then try thumping the column to get it to unlock. In the locked position removing the ESL requires steering column removal.
I posted recently with pics ref fitting an emulator to my W204, with ESL failed in the unlocked position.
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Old Oct 13, 2025 | 11:13 AM
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W204 C250 Sport (AMG Package with Pano Roof)
Just realized this post is ref a 2001 E 320.
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Old Oct 13, 2025 | 11:26 AM
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2014 c300 w204.080 3.5 v6
Yes if you need to replace a party of three ignition switch system it will have to bed programmed. So you should be sure that's what you need.
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Old Oct 13, 2025 | 10:07 PM
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W204 2010 C300 4matic Sport M272
Do you have two key fobs to try?

When you insert the key does a message on the dash come up?

Does the steering wheel unlock, can you turn it?

Have you inspected the key fob itself, look for cracked solder joints at the coil?

A new/used EIS will have to be programmed.





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