Cannot unlock the electronic steering lock (ESL)?

Tiny
JUN841NC
  • MEMBER
  • 2004 MERCEDES BENZ C230
  • 1.8L
  • 4 CYL
  • 2WD
  • MANUAL
  • 230,000 MILES
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.
Wednesday, July 9th, 2025 AT 3:51 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 52,272 POSTS
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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Wednesday, July 9th, 2025 AT 6:50 PM
Tiny
JUN841NC
  • MEMBER
  • 20 POSTS
Thank you for the response. Would removing the ESL make the vehicle start again?
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Thursday, July 10th, 2025 AT 3:14 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 52,272 POSTS
No, this is part of the security system, and it must be in working order to allow the engine to start.
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Thursday, July 10th, 2025 AT 9:47 AM

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