Trouble detecting key
Thread Starter
Member
Joined: Sep 2014
Posts: 202
Likes: 31
From: Chicago
2019 C43 AMG, 2016 BMW M235xi (gone)
Trouble detecting key
Hey all...does anyone else have this problem? I generally keep my key fob in my backpack when I head to work. Often, when I get in the car and push start, the car does not recognize that the key is in the car. The screen prompts me to place the key on the pad in the cupholder. This doesn't happen every time, but at least several times a week. Anybody else?
Super Member
Joined: Apr 2007
Posts: 593
Likes: 17
From: Orange County
2019 AMG C43
I have the same issue, planning on asking MB next time i take the car in. I replaced the fob battery so its not that, but occasionally i have to click the button a few times to start.
I wonder if it has to do with the new start/stop button. Its more of a click vs press of older buttons. That's the only thing i have been able to come up with.
I wonder if it has to do with the new start/stop button. Its more of a click vs press of older buttons. That's the only thing i have been able to come up with.
Thread Starter
Member
Joined: Sep 2014
Posts: 202
Likes: 31
From: Chicago
2019 C43 AMG, 2016 BMW M235xi (gone)
Maybe it only happens on Selenite Gray sedans. You have excellent taste. 
I have the same issue, planning on asking MB next time i take the car in. I replaced the fob battery so its not that, but occasionally i have to click the button a few times to start.
I wonder if it has to do with the new start/stop button. Its more of a click vs press of older buttons. That's the only thing i have been able to come up with.
I wonder if it has to do with the new start/stop button. Its more of a click vs press of older buttons. That's the only thing i have been able to come up with.
Senior Member
Joined: May 2018
Posts: 296
Likes: 46
From: Connecticut
2019 AMG C43 Sedan
I have the same issue, planning on asking MB next time i take the car in. I replaced the fob battery so its not that, but occasionally i have to click the button a few times to start.
I wonder if it has to do with the new start/stop button. Its more of a click vs press of older buttons. That's the only thing i have been able to come up with.
I wonder if it has to do with the new start/stop button. Its more of a click vs press of older buttons. That's the only thing i have been able to come up with.
.
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Member
Joined: Aug 2018
Posts: 212
Likes: 64
From: the Right coast
'19 C43
I experienced this issue occasionally when I had the key fob in the same pocket as my phone. It seems that the key is susceptible to EM interference. Is there a computer or other EM source in the backpack that might be causing interference with the key fob?
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Super Member
Joined: Apr 2007
Posts: 593
Likes: 17
From: Orange County
2019 AMG C43
One thing I had noticed is I needed to hold the brake peddle in a couple seconds longer, otherwise it would crank a bit longer than normal before firing (If I just jumped in and tried to start instantly). Not sure if this helps with the key though. I imagine something with the key less go feature, or as suggested the Selenite Gray .
.Or yep clearly a Selenite issue
Member
Joined: Jan 2019
Posts: 85
Likes: 27
2016 C300 4matic
I've read in other posts the Fob battery was at fault. The Chinese have pirated the industry so well (Energizer Battery in Blue blister packs are supposed to be knock offs the real ones come in a Pink pack) that you cant tell the knock off from real ones. Found a link for MB ones. For $10 it's worth a try if nothing else you've got back up batteries.
Mercedes-Benz Remote Key Battery Keyless Entry Genuine Original 0000388 (2pcs)Average rating:5out of5stars, based on2reviews2 reviewsMercedes-Benz
$10.00
Member
Joined: Dec 2016
Posts: 208
Likes: 29
From: Toronto
C43, GLS450
