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Wireless key access not working every time.

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Old May 4, 2018 | 04:26 PM
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Wireless key access not working every time.

I’ve tried both keys. When I approach the car it is not opening the door sometimes. Am I missing a setting or doing something wrong. Car is only a few weeks old.
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Old May 4, 2018 | 04:48 PM
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try new key battery.... ours didn't last long on the new Cab...
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Old May 4, 2018 | 05:25 PM
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For the first time today my door did not automagically unlock when I grabbed the handle. Tried a couple of times, but nothing happened.

Unlocked with the key fob just fine.

Only thing I can think of is that a little earlier I had run down the windows to help keep the car cooler, then using the key fob I double pressed and held the lock button to raise the windows remotely.

Checking the manual I found that pressing the lock button twice disables the keyless go feature.

I should have pressed and held the lock button rather than double clicking it.

May not be related to your problem, but thought I'd pass it along just in case.
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Old May 5, 2018 | 10:22 PM
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E63 2018
Originally Posted by E634Me
For the first time today my door did not automagically unlock when I grabbed the handle. Tried a couple of times, but nothing happened.

Unlocked with the key fob just fine.

Only thing I can think of is that a little earlier I had run down the windows to help keep the car cooler, then using the key fob I double pressed and held the lock button to raise the windows remotely.

Checking the manual I found that pressing the lock button twice disables the keyless go feature.

I should have pressed and held the lock button rather than double clicking it.

May not be related to your problem, but thought I'd pass it along just in case.
It is exactly what you said, once you pressed the lock button on the key, the car will not unlock by just putting your hand on the handle. My suggestion is never lock the car with the key button, just lock it by putting your hand on the door handle to lock it.
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Old May 6, 2018 | 02:02 AM
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We lock ours with the lock button on the Fob almost all the time and always unlock the car by just touching the door handle. It works every time. I think the only problem would be if the lock button on the Fob is pressed twice in succession.
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Old May 6, 2018 | 12:32 PM
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The only time I have this issue is if I have the key and cellphone in the same pocket. This also causes issues with my Porsche.
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Old Nov 28, 2024 | 02:02 PM
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Originally Posted by stealth.pilot
The only time I have this issue is if I have the key and cellphone in the same pocket. This also causes issues with my Porsche.
I've had tge same issue with a Keychain garage door opener. It's caused by RF interference.
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Old Nov 29, 2024 | 09:40 AM
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I think the issue is that some vehicle makes used to have the user double click the fob to lock it. For some time, at least the European makes, have disabled the fob following a double click on lock.

The purpose is to disable your fob so that it cannot be spoofed/scanned and used to open the vehicle. You can and should use this when away for vacation or away from home for some time.

So the system is working exactly as intended, very few understand this is the intent of the design. I scratched my head for years on my previous car before figuring this out.
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Old Nov 29, 2024 | 09:56 AM
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Originally Posted by YYC53
I think the issue is that some vehicle makes used to have the user double click the fob to lock it. For some time, at least the European makes, have disabled the fob following a double click on lock.

The purpose is to disable your fob so that it cannot be spoofed/scanned and used to open the vehicle. You can and should use this when away for vacation or away from home for some time.

So the system is working exactly as intended, very few understand this is the intent of the design. I scratched my head for years on my previous car before figuring this out.
Make sure to do it for the spare key as well if worried about being relayed.
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Old Nov 29, 2024 | 10:32 AM
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Mercedes gl450
Originally Posted by YYC53
I think the issue is that some vehicle makes used to have the user double click the fob to lock it. For some time, at least the European makes, have disabled the fob following a double click on lock.

The purpose is to disable your fob so that it cannot be spoofed/scanned and used to open the vehicle. You can and should use this when away for vacation or away from home for some time.

So the system is working exactly as intended, very few understand this is the intent of the design. I scratched my head for years on my previous car before figuring this out.
This makes sense if you used the fob. But if you used the touch sensors method to lock/unlock the doors, this wouldn't be relevant.
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Old Nov 29, 2024 | 11:19 AM
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No, the double click turns the fob off, the car cannot see it to validate unlocking the door.
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Old Nov 29, 2024 | 11:26 AM
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Originally Posted by YYC53
No, the double click turns the fob off, the car cannot see it to validate unlocking the door.
This is correct, since the key is no longer sending a signal.
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Old Nov 29, 2024 | 11:43 AM
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Mercedes gl450
Originally Posted by YYC53
No, the double click turns the fob off, the car cannot see it to validate unlocking the door.
okay. Makes sense.
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Old Dec 2, 2024 | 10:19 AM
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I was about to say.

Double tapping the lock button on the FOB turns off the fob and by design, the proximity unlock.

Also a weak battery in the FOB will also exhibit some very odd behavior.
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Old Dec 2, 2024 | 11:19 AM
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Originally Posted by figuwx
I was about to say.

Double tapping the lock button on the FOB turns off the fob and by design, the proximity unlock.

Also a weak battery in the FOB will also exhibit some very odd behavior.
Isn't there supposed to be a check key battery message when it is low?
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Old Dec 2, 2024 | 11:59 AM
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Originally Posted by W205C43PFL
Isn't there supposed to be a check key battery message when it is low?
Supposedly!

I never got the error message but i was getting some behaviors such as touch handle, no unlock.
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Old Dec 2, 2024 | 02:10 PM
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Originally Posted by figuwx
Supposedly!

I never got the error message but i was getting some behaviors such as touch handle, no unlock.
I see, that's why.
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