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Intermittent Key Fob Issue

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E-Class (W212) 2010 - 2016: E 350, E 550

Intermittent Key Fob Issue

 
Old 03-15-2018, 09:00 PM
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2012 E550 Cabriolet 2011VW Eos 1985 Pininfarina Spider
Intermittent Key Fob Issue

About once a week my fob for my keyless-go will not register with the car. I can not open the door or start the car without using the key fob. After I unlock and/or lock the car, I can activate the start button. I replaced the battery and no change. Any ideas?
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Old 03-15-2018, 09:28 PM
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Do you have both keys and if so are they both acting the same way?
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Old 03-16-2018, 05:51 AM
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2012 E550 Cabriolet 2011VW Eos 1985 Pininfarina Spider
I bought the car with only one key fob.
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Old 03-16-2018, 08:28 AM
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well, that's a problem. Could be a host of issues then. bad key, bad door receiver, battery....
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Old 03-16-2018, 10:01 PM
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OP, this is a pretty common issue. It happens to me also. I've spoken with three other MB owners who have this issue. I've spoken with two different service advisors who acknowledge that it is a known issue to MB. I read one time that someone had a software update fix the problem. (The problem is not a low battery.)
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Old 03-17-2018, 04:46 PM
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204/207/212 reference bulletin LI80.61-P-049924, see attachment. Out of warranty, contact MBUSA to approve goodwill repair due to known production software error 800-367-6372.
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Old 03-17-2018, 05:09 PM
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W209, W124
While you are there, order a 2nd key.
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Old 03-17-2018, 09:06 PM
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Originally Posted by konigstiger View Post
204/207/212 reference bulletin LI80.61-P-049924, see attachment. Out of warranty, contact MBUSA to approve goodwill repair due to known production software error 800-367-6372.
Thanks Konigstiger. I asked my dealer nicely, but they refused :-(
I will call MBUSA
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Old 03-18-2018, 10:25 AM
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From what I have read that if you press the lock or unlock button on your vehicle three times or more you disable the Keyless go system. The only way to allow it to work is by pressing the lock or unlock button. To re-inilitize the system. Had the same issue with my 14 550. The dealership replaced both batteries in both keys. the car went back then the relaced the antenna, the car went back and then the replaced both keys. I have not had the issue since but read somewhere about the key pressing. I am aware now and have not had the issue since.
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