Keyless go issue?
Thread Starter
Junior Member
Joined: Oct 2014
Posts: 64
Likes: 3
2023 EQS 580 SUV
Keyless go issue?
4 times (that I can specifically remember) over the past week I have been unable to unlock my car by simply pulling on the door handle. It's as if the car does not recognize the key being close to it. The first 3 times I took the key out of my pocket and pressed the unlock button and was able to open the door. I put the key back in my pocket and was able to start the car.
The last time it happened I walked away from the car and back into range and was still not able to unlock the car. Again, I pressed the unlock button and was able to start the car.
It's a little embarrassing when going to lunch with a group of people from work, walking up to a new (2.5 months) car and pulling on the door handle multiple times and nothing happens. When the guy with the new Camry jokes "hmmmm....my car opens every time" it does sting a little
So far I have been able to unlock the car every time by pressing the button. I am a little concerned this problem could evolve into something more - especially when my wife is driving it.
Anyone else experience this?
The last time it happened I walked away from the car and back into range and was still not able to unlock the car. Again, I pressed the unlock button and was able to start the car.
It's a little embarrassing when going to lunch with a group of people from work, walking up to a new (2.5 months) car and pulling on the door handle multiple times and nothing happens. When the guy with the new Camry jokes "hmmmm....my car opens every time" it does sting a little
So far I have been able to unlock the car every time by pressing the button. I am a little concerned this problem could evolve into something more - especially when my wife is driving it.
Anyone else experience this?
Newbie
Joined: Nov 2014
Posts: 9
Likes: 0
2015 C Class 4 Matic
try to keep cell phone away from the key
I had this and someone on this forum advised me to keep the cell phone away from the key. No problems since then.
4 times (that I can specifically remember) over the past week I have been unable to unlock my car by simply pulling on the door handle. It's as if the car does not recognize the key being close to it. The first 3 times I took the key out of my pocket and pressed the unlock button and was able to open the door. I put the key back in my pocket and was able to start the car.
The last time it happened I walked away from the car and back into range and was still not able to unlock the car. Again, I pressed the unlock button and was able to start the car.
It's a little embarrassing when going to lunch with a group of people from work, walking up to a new (2.5 months) car and pulling on the door handle multiple times and nothing happens. When the guy with the new Camry jokes "hmmmm....my car opens every time" it does sting a little
So far I have been able to unlock the car every time by pressing the button. I am a little concerned this problem could evolve into something more - especially when my wife is driving it.
Anyone else experience this?
The last time it happened I walked away from the car and back into range and was still not able to unlock the car. Again, I pressed the unlock button and was able to start the car.
It's a little embarrassing when going to lunch with a group of people from work, walking up to a new (2.5 months) car and pulling on the door handle multiple times and nothing happens. When the guy with the new Camry jokes "hmmmm....my car opens every time" it does sting a little
So far I have been able to unlock the car every time by pressing the button. I am a little concerned this problem could evolve into something more - especially when my wife is driving it.
Anyone else experience this?
Senior Member
Joined: May 2014
Posts: 257
Likes: 2
2015 C400 loaded
4 times (that I can specifically remember) over the past week I have been unable to unlock my car by simply pulling on the door handle. It's as if the car does not recognize the key being close to it. The first 3 times I took the key out of my pocket and pressed the unlock button and was able to open the door. I put the key back in my pocket and was able to start the car.
The last time it happened I walked away from the car and back into range and was still not able to unlock the car. Again, I pressed the unlock button and was able to start the car.
It's a little embarrassing when going to lunch with a group of people from work, walking up to a new (2.5 months) car and pulling on the door handle multiple times and nothing happens. When the guy with the new Camry jokes "hmmmm....my car opens every time" it does sting a little
So far I have been able to unlock the car every time by pressing the button. I am a little concerned this problem could evolve into something more - especially when my wife is driving it.
Anyone else experience this?
The last time it happened I walked away from the car and back into range and was still not able to unlock the car. Again, I pressed the unlock button and was able to start the car.
It's a little embarrassing when going to lunch with a group of people from work, walking up to a new (2.5 months) car and pulling on the door handle multiple times and nothing happens. When the guy with the new Camry jokes "hmmmm....my car opens every time" it does sting a little
So far I have been able to unlock the car every time by pressing the button. I am a little concerned this problem could evolve into something more - especially when my wife is driving it.
Anyone else experience this?
Thread Starter
Junior Member
Joined: Oct 2014
Posts: 64
Likes: 3
2023 EQS 580 SUV
If it happens again, I will try and make a mental note of things in my pockets and inside the car.I know on one occasion, my phone was inside the car when it did not unlock. I ran inside a convenience store to buy something and left the phone in the ashtray/cupholder space with the lid closed.
Super Member
Joined: Mar 2009
Posts: 911
Likes: 22
From: Ottawa, Canada
2014 C63 507, 2012 R350
Yes, but I always keep my keys and phone in a different pocket. Learned that lesson the hard way on an older iPhone (scratched screen). If it happens again, I will try and make a mental note of things in my pockets and inside the car.
I know on one occasion, my phone was inside the car when it did not unlock. I ran inside a convenience store to buy something and left the phone in the ashtray/cupholder space with the lid closed.
If it happens again, I will try and make a mental note of things in my pockets and inside the car.I know on one occasion, my phone was inside the car when it did not unlock. I ran inside a convenience store to buy something and left the phone in the ashtray/cupholder space with the lid closed.
I've had 4 Benzes with Keyless Go and this is not a C400 issue rather a MB issue that happens sporadically, as annoying as it sometimes is. I have sworn at my door handle in previous benzes as curious onlookers looked at me as I yelled " Open the effing door!", must have looked crazy
Senior Member
Joined: Jun 2009
Posts: 368
Likes: 0
B200T
I've had 4 Benzes with Keyless Go and this is not a C400 issue rather a MB issue that happens sporadically, as annoying as it sometimes is. I have sworn at my door handle in previous benzes as curious onlookers looked at me as I yelled " Open the effing door!", must have looked crazy
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Newbie
Joined: Jan 2015
Posts: 11
Likes: 0
2015 C400
Yes I have the same issue. So far it has happened twice on my C400, about 1 month old.
Selling me a vehicle that locks me out seems a little fraudulent in a way. I plan on talking to my lawyer about this to see if I can get my money back.
Selling me a vehicle that locks me out seems a little fraudulent in a way. I plan on talking to my lawyer about this to see if I can get my money back.
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Member
Joined: Jan 2015
Posts: 99
Likes: 2
2015 C300 Sport Package
Three thoughts.
One, the only time I had an issue unlocking the door by just pulling the handle was after I had locked the car with the remote -- I don't know if that is related or not. It unlocked fine with the remote.
Two, you may have a low battery; I had one in one of my remotes. The dash told me it was low, but the manual shows an easy way to test the battery strength.
Three, it may be operator error. Look at other threads here where people have not been able to unlock because they are touching the lock sensor while trying to open the door.
Oh, and there is a workaround if keyless go is not working at all. See the manual.
One, the only time I had an issue unlocking the door by just pulling the handle was after I had locked the car with the remote -- I don't know if that is related or not. It unlocked fine with the remote.
Two, you may have a low battery; I had one in one of my remotes. The dash told me it was low, but the manual shows an easy way to test the battery strength.
Three, it may be operator error. Look at other threads here where people have not been able to unlock because they are touching the lock sensor while trying to open the door.
Oh, and there is a workaround if keyless go is not working at all. See the manual.
Last edited by djdj; Jan 22, 2015 at 08:00 AM.
Newbie
Joined: Jan 2015
Posts: 11
Likes: 0
2015 C400
Three thoughts.
One, the only time I had an issue unlocking the door by just pulling the handle was after I had locked the car with the remote -- I don't know if that is related or not. It unlocked fine with the remote.
Two, you may have a low battery; I had one in one of my remotes. The dash told me it was low, but the manual shows an easy way to test the battery strength.
Three, it may be operator error. Look at other threads here where people have not been able to unlock because they are touching the lock sensor while trying to open the door.
Oh, and there is a workaround if keyless go is not working at all. See the manual.
One, the only time I had an issue unlocking the door by just pulling the handle was after I had locked the car with the remote -- I don't know if that is related or not. It unlocked fine with the remote.
Two, you may have a low battery; I had one in one of my remotes. The dash told me it was low, but the manual shows an easy way to test the battery strength.
Three, it may be operator error. Look at other threads here where people have not been able to unlock because they are touching the lock sensor while trying to open the door.
Oh, and there is a workaround if keyless go is not working at all. See the manual.
I love your logical approach. #1 is definitely not it. #2, battery, I would hope the car would tell me when the battery is low. But I will take your advice and see how to test it.
Three may be the one. Being new to the car, I suppose it is possible that my thumb may have been touching the outer sensor. I will be more alert to that now. In fact, the second time it happened, I was with someone and they beat me to their door. They may have been pressing on the lock part of the handle while I was trying to open.
Never let it be said that I am not open minded. I will try these things. Thank you for your post.
Thread Starter
Junior Member
Joined: Oct 2014
Posts: 64
Likes: 3
2023 EQS 580 SUV
I love your logical approach. #1 is definitely not it. #2, battery, I would hope the car would tell me when the battery is low. But I will take your advice and see how to test it.
Three may be the one. Being new to the car, I suppose it is possible that my thumb may have been touching the outer sensor. I will be more alert to that now. In fact, the second time it happened, I was with someone and they beat me to their door. They may have been pressing on the lock part of the handle while I was trying to open.
Never let it be said that I am not open minded. I will try these things. Thank you for your post.
Three may be the one. Being new to the car, I suppose it is possible that my thumb may have been touching the outer sensor. I will be more alert to that now. In fact, the second time it happened, I was with someone and they beat me to their door. They may have been pressing on the lock part of the handle while I was trying to open.
Never let it be said that I am not open minded. I will try these things. Thank you for your post.
That could explain it as it has happened when other people are with me as far as I can recall.
Super Member
Joined: Sep 2014
Posts: 561
Likes: 4
From: UK (South West)
2015 C220 AMG Line Bluetech.
The same is not true, however, if you (the person with the key) inadvertently rest the back of your thumb onto the outside of the handle, as you grab the back of the door handle to unlock. I know, in our first few weeks of ownership, we had to "think" about it, just a little, to train our movements - seems really dumb to say, but it was definitely catching us out to start off.
Since then, not an issue - apart from one occasion when my missus had her key buried in the bottom of her bag - under her iPhone - got in and the car wouldn't start (bringing up a "no key detected" message) and then promptly re-locked the doors with her inside - PANIC! The internal door release wouldn't open it, nor the central locking release button.
After that, I had to show her where the Emergency Tailgate release was, before she would get back in!
Anyway, that was Audi. Since making sure the key fob is always separated from her iPhone, it has been flawless.
Newbie
Joined: Jan 2015
Posts: 11
Likes: 0
2015 C400
Your story about wife being locked in the car, ouch! I would never be able to get mine in it ever again! Hopefully I read that right and it was an Audi!
Thread Starter
Junior Member
Joined: Oct 2014
Posts: 64
Likes: 3
2023 EQS 580 SUV
It happened again last night after work. I was alone so no one else was touching any other handles. My phone was in my jacket pocket and my key in my pants pocket. I walked around the car and tried every door handle. I walked away and came back and nothing.
This time I pressed the lock button on the remote instead of unlock. The car locked and the lights lit as they normally would when locking the car. When the lights went out I grabbed the driver side door handle and it unlocked.
My mother-in-law had a similar issue with her RX300 and because it too was intermittent she ended up going back and forth to the dealer 5 times. I honestly don't even know if the problem is fixed but she does not talk about it any more.
I don't want to end up taking this car in multiple times and each time have the tech say "worked for me". I know it is intermittent which is going to make this problem hard to solve. Maybe I should take a video the next time it happens?
This time I pressed the lock button on the remote instead of unlock. The car locked and the lights lit as they normally would when locking the car. When the lights went out I grabbed the driver side door handle and it unlocked.
My mother-in-law had a similar issue with her RX300 and because it too was intermittent she ended up going back and forth to the dealer 5 times. I honestly don't even know if the problem is fixed but she does not talk about it any more.
I don't want to end up taking this car in multiple times and each time have the tech say "worked for me". I know it is intermittent which is going to make this problem hard to solve. Maybe I should take a video the next time it happens?
Newbie
Joined: Jan 2015
Posts: 11
Likes: 0
2015 C400
It happened again last night after work. I was alone so no one else was touching any other handles. My phone was in my jacket pocket and my key in my pants pocket. I walked around the car and tried every door handle. I walked away and came back and nothing.
This time I pressed the lock button on the remote instead of unlock. The car locked and the lights lit as they normally would when locking the car. When the lights went out I grabbed the driver side door handle and it unlocked.
My mother-in-law had a similar issue with her RX300 and because it too was intermittent she ended up going back and forth to the dealer 5 times. I honestly don't even know if the problem is fixed but she does not talk about it any more.
I don't want to end up taking this car in multiple times and each time have the tech say "worked for me". I know it is intermittent which is going to make this problem hard to solve. Maybe I should take a video the next time it happens?
This time I pressed the lock button on the remote instead of unlock. The car locked and the lights lit as they normally would when locking the car. When the lights went out I grabbed the driver side door handle and it unlocked.
My mother-in-law had a similar issue with her RX300 and because it too was intermittent she ended up going back and forth to the dealer 5 times. I honestly don't even know if the problem is fixed but she does not talk about it any more.
I don't want to end up taking this car in multiple times and each time have the tech say "worked for me". I know it is intermittent which is going to make this problem hard to solve. Maybe I should take a video the next time it happens?
So that completely kills the myth of the iPhone or any other magnetic interence. Next test for me is to replace the batteries in the FOB.
A note to anyone who may be with MB or know someone there: this is a highly embarrasing bug when encountered in the presence of others which causes extreme brand questioning from those that see it. I really don't understand how you are not all over this (maybe you are and we just don't know). Furthermore, if a person were a doctor or someone taking a person to the hospital for some reason, this problem could present very costly liable damages and instigate class action lawsuits (a nightmare for brand image). I'd be all over it if I were you. And if you are, how about some communication to your customers?
Thread Starter
Junior Member
Joined: Oct 2014
Posts: 64
Likes: 3
2023 EQS 580 SUV
This just happened again today when going to lunch. About 20 times in total over the past month or so.
I will address this with the dealer when I go for my first scheduled maintenance but was wondering if anyone else has talked to their dealer about it?
I will address this with the dealer when I go for my first scheduled maintenance but was wondering if anyone else has talked to their dealer about it?
Senior Member
Joined: Feb 2013
Posts: 327
Likes: 20
From: USA
2015 C300 RWD Sport Premium
Super Member
Joined: Apr 2010
Posts: 667
Likes: 8
From: Boston 'burbs
2018 E300 Lux, 2006 Corvette Z51, 2015 Mercedes ML350 (wife's)
It almost seems like the car is not "awake" and looking for the key at times, and when the lock or unlock button is pressed it then senses it. Strange.
Member
Joined: Jul 2014
Posts: 224
Likes: 1
From: Ajax, Ontario, Canada
2015 C400 4matic W205
Same problem. Happens maybe once a month. When it happens the remote unlock or any other button on the key fob also don't work. It's extremely ebarsaing! Makes you look like you are trying to break into your own car! If you walk away for 5 minutes and return it works all of a sudden.
Newbie
Joined: Sep 2014
Posts: 8
Likes: 0
'15 C300 RWD Luxury
Could the problem be the feature on the key to put it to sleep? If you press the lock button twice, the key flashes a long red flash and the key is in sleep mode, disabling the keyless go. As soon as you press a button again, the key wakes up and works normally. Depending on how the key is stored in your pocket or where ever, if the button gets pressed twice, you would have the problem.
MBWorld Fanatic!
Joined: Sep 2014
Posts: 1,822
Likes: 33
From: Whitefield, NH
2015 C300 Sport: Palladium, Premium, Multimedia, Leather, BLIS
Could the problem be the feature on the key to put it to sleep? If you press the lock button twice, the key flashes a long red flash and the key is in sleep mode, disabling the keyless go. As soon as you press a button again, the key wakes up and works normally. Depending on how the key is stored in your pocket or where ever, if the button gets pressed twice, you would have the problem.
