jbar

Sometimes when I walk up to the car with the key fob the doors unlock automatically - at other times I need to manually use the key fob to unlock it, I assume there is a reason why this happens. Any ideas?

Mikey53

you double tapped the key fob at some point and turned it off.

jbar

Key fob humor?

icwhatudidthere

Lol no. You can disable Keyless Go:

https://mbworld.org/forums/m-class-w...eyless-go.html

jbar

Thanks! There was a lot I didn't know about the MB key fob - first that it has a light and second, that it is possible to disable keyless-go. Unfortunately, I still am unable to understand why the doors sometimes unlock when approaching the car with my key and at other times don't. I have not had this problem with other Mercedes I have owned - so I wonder what is it about my EQE that makes it different?

W205C43PFL

Did you try your spare key? I wonder if your vehicle is sometimes not detecting your key, or try changing the battery.

jbar

Yes, I tried the spare key - same results. The door locks work as they expected unless they are locked overnight. In that case I have to use the key fob to unlock the doors. I wonder if that is the way they are programmed to work?

W205C43PFL

I wonder if for any reasons your key wasn't woken up because as you know your key automatically enters sleep mode after a few minutes of inactivity to prevent relay attacks.

jbar

I did not know that - so thank you for the explanation!!

W205C43PFL

I guess the next experiment would be to try shaking the key quite hard before approaching the vehicle, if it works then you know the key was asleep and wakey-wakey is what was needed.

jbar

Thanks - I'll try that!

W205C43PFL

Please keep us posted : )

nosnoop

But the thing is that you shouldn't need to do this.
Normal walking to the car should have enough movement to wake the key up.
So even if this works, there is still something wrong with that key.

W205C43PFL

Well it is just an experiment really, it doesn't hurt to try but ya then there is something wrong with both keys.

sno

mine has the same behavior and I did not double tap the fob... LOL it seems to work when it wants.

W205C43PFL

I mean... the double tap might have happened in your pocket, you never know.

LOGOSDJ

You can also simply swipe your hand across the door handle to get the handles to pop out if needed (with key in your pocket or bag).

sno

for sure!

AlanG13

Have similar issue with Tesla Model S keyfob. Normally happens when I have something else in pocket (phone, wad of bills, etc.) Posting here because I just ordered EQE500 SUV

W205C43PFL

Which is strange because it is not common that smartphones can interfere with the smartkey at least not in my experience with multiple vehicles.

ScottM5000

Very occasionally mine doesn't work. Are you aware that you can caress the handle and it will open? - assuming it is not locked. This works without the fob also - if unlocked.

saintvir

So far, my car has been consistent: the door handles pop out and present themselves as I approach with the key fob. But, the doors are not unlocked yet. I either need to touch the inside of one of the door handles; or, press unlock on the key fob to unlock the doors.

I'm sorry I haven't answered your query but I have been trying to replicate your situation but without success, so far.

Crito

I've noticed this too but only happens in my garage after it's been sitting a while. I sometimes also get an SOS not ready icon when starting the car in the mornings. So I kind of figured it might be related to the 4G modem and wake-on-LAN/WAN function, like it's gone into a deep sleep state. Correlation does not imply causation though so I could be completely wrong. Gonna try that key shake trick next time to see if it makes any difference.

bytemaster0

Okay, I think I've figured out why this behavior happens: The performance of the handles popping out on my vehicle works flawlessly. However, if you walk by the car more than once or twice and the handles pop out to greet you without you proceeding to unlock/open a door, I think the car starts to realize that this triggering may be in error or unnecessary and stops reacting. This only happens if I walk through the garage a couple of times and don't proceed to open the car doors. For some, if your garage is close to your bedroom or larger living spaces, I'm sure the doors could be triggered more easily and the car assumes that the behavior is excessive and disables the automatic handle pop-out system. Something worth testing out by others, for sure, but it seems to be the case for the observations I've made.

BenjaminKohl

From my experience in the dealership showroom, the best way to open the car is that as you walk up to the car the doorhandles will pop out and then you grab the door hendle from the main desction from behind, which unlocks the door as you pull it open.