SmartKey Battery Question
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Joined: Sep 2018
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2018 E-300 4matic Sedan
SmartKey Battery Question
I recently needed to replace the SmartKey battery, and I didn't receive any advance notice that it was getting low. The first time I replaced it, I received a message on the dashboard that it needed to be replaced, while the SmartKey was still functioning. Is there anything I can do to ensure that I receive a message ahead of time? I had used the car a couple of days earlier, and the SmartKey was working fine.
On a possibly related note, I usually have the center display screen turned off. I rarely use the radio, and I find the screen distracting. I can't remember whether the "replace battery" message I received was on the dashboard display or the center display.
On another sort of related note, can I reasonably expect to get a message when the engine battery is starting to go bad?
On a possibly related note, I usually have the center display screen turned off. I rarely use the radio, and I find the screen distracting. I can't remember whether the "replace battery" message I received was on the dashboard display or the center display.
On another sort of related note, can I reasonably expect to get a message when the engine battery is starting to go bad?
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Joined: May 2018
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From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
I recently needed to replace the SmartKey battery, and I didn't receive any advance notice that it was getting low. The first time I replaced it, I received a message on the dashboard that it needed to be replaced, while the SmartKey was still functioning. Is there anything I can do to ensure that I receive a message ahead of time? I had used the car a couple of days earlier, and the SmartKey was working fine.
MBWorld Fanatic!
Joined: May 2018
Posts: 3,048
Likes: 905
From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
I bought 12 batteries from Costco for $9.99. I also started to lock my Mercedes, which according to many posts on this forum, puts the Mercedes into "sleep" mode which saves the battery in the fob.
Thread Starter
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Joined: Sep 2018
Posts: 111
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2018 E-300 4matic Sedan
I initially thought there was something more seriously wrong, because the first thing I tried was using the other SmartKey, but it also didn't work. Apparently, its battery will drain over time, even if it stays in the house and is unused.
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Joined: Sep 2018
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2018 E-300 4matic Sedan
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MBWorld Fanatic!
Joined: May 2018
Posts: 3,048
Likes: 905
From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
Less than a $1 a battery on Amazon:
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