Garage door synch won't hold
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2017 Mercedes Benz C300
Garage door synch won't hold
In our 2017 C300, when I try and sync the garage door openers to the buttons on the mirror, it will work but after a few hours, the buttons no longer work. Could it be that the auxiliary battery is failing, or could there be another reason?
Thanks,
Frank
Thanks,
Frank
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
What opener. If your opener has a roaming code (their term) things can get funky. We had a ton of issues with our old opener. The new one (Chamberlain) works perfectly in all of our cars from 2004 to 2024 and our RV.
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MBWorld God!
Joined: Dec 2019
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I see, the aux battery shouldn't hold the memory to homelink but it could, changing it might not be a bad idea. I think you know already but that battery is located underneath the passenger side footwell (if I recalled correctly).
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2017 Mercedes Benz C300
Thanks for the suggestions. The opener took the Homelink sync code for the other car, after I tried to get the C300 to do so, so it would appear that the opener itself is still able to take new syncing codes. I don't think that it has been too long since the aux. battery was replaced.
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From: San Francisco Bay Area
2019 C63CS
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Thread Starter
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Joined: Aug 2021
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2017 Mercedes Benz C300
I don't think that the two separate Chamberlain units that we have the rolling codes. The Chevrolet synced, and held, with nothing else to do, after I tried the same with our MB which would not hold...
Not to argue, but it seems like the MB should be able to do what the Chevrolet did.
Not to argue, but it seems like the MB should be able to do what the Chevrolet did.
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MBWorld God!
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Thanks for the suggestions. The opener took the Homelink sync code for the other car, after I tried to get the C300 to do so, so it would appear that the opener itself is still able to take new syncing codes. I don't think that it has been too long since the aux. battery was replaced.
Out Of Control!!
Joined: Nov 2018
Posts: 11,406
Likes: 5,326
From: San Francisco Bay Area
2019 C63CS
I don't think that the two separate Chamberlain units that we have the rolling codes. The Chevrolet synced, and held, with nothing else to do, after I tried the same with our MB which would not hold...
Not to argue, but it seems like the MB should be able to do what the Chevrolet did.
Not to argue, but it seems like the MB should be able to do what the Chevrolet did.
https://www.homelink.com/program
