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key not detected error

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Old Nov 1, 2021 | 03:34 AM
  #1  
nigel_nz's Avatar
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C250 CGI
key not detected error

Hi there,

Hope someone could help please. Has anyone encountered the error below and what was the fix? Both my keys are not working, so I can't use the push start button. However, I can start/drive the car by manually inserting the keyfob. I do have a new car battery and I've also replaced the battery in the keyfob, but still, the push start isn't working.

NOTE: I've done some electrical work (added an android screen to my W205), so I disconnected the negative terminal for about 3-4 hours whilst the work is being carried out. When I connected the battery terminal, that is when the keyfob isn't working properly. All other functions are working as expected. Only this push start and error below are the ones giving me a headache.

Thanks in advance and hope someone could help out.



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Old Nov 1, 2021 | 08:12 AM
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W205 2015
When you replaced your screen your removed your central console. This must have got the key sensor found under the right cup holder somehow loose. Try removing the central console and see if something wrong with the sensor.
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Old Nov 2, 2021 | 04:35 PM
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Hi Andy74, you are a genius!!! Thank you and it fixed the issue. For some reason I forgot to re-connect piece of wiring when I was putting back everything. Now everything is back to normal.

Thank you very much, hope you have a good day.
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Old Nov 2, 2021 | 05:04 PM
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Originally Posted by nigel_nz
Hi Andy74, you are a genius!!! Thank you and it fixed the issue. For some reason I forgot to re-connect piece of wiring when I was putting back everything. Now everything is back to normal.

Thank you very much, hope you have a good day.
Awsome well done.
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Old Nov 15, 2023 | 10:41 PM
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C200 W205
Hi I met same situation after installing android player in my w205, can you let me know more details how to solve the problem? Thank you
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