Cannot unlock the electronic steering lock (ESL)?

2004 MERCEDES BENZ C230
230,000 MILES • 1.8L • 4 CYL • 2WD • MANUAL
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JUN841NC
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Good day,

I cannot unlock my steering. Key not turning in ignition. Is it an electronic steering lock fault or electronic ignition fault? The key unlocks n locks vehicle. I cannot put it on my scanning tool. Please advise.
Jul 9, 2025 at 3:51 AM
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STRAILER
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It sounds like the ignition switch when bad, this is why you cannot turn it. I would try moving the steering wheel back and forth while trying to turn the key. Also, make sure the battery is in good shape. There is a chance the ESL motor or control board inside the steering lock mechanism fails over time. If the EIS doesn’t recognize the key, it won’t send the unlock signal to the ESL. Try a spare key and make sure the key battery is good. This video will show you how:

https://www.youtube.com/watch?v=QJssQDhH8g0&pp=0gcJCcEJAYcqIYzv

If not here is how to change out the switch which you will need a new key. Please upload pictures or videos in your response.
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Jul 9, 2025 at 6:50 PM
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JUN841NC
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Thank you for the response. Would removing the ESL make the vehicle start again?
Jul 10, 2025 at 3:14 AM
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STRAILER
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No, this is part of the security system, and it must be in working order to allow the engine to start.
Jul 10, 2025 at 9:47 AM