SL/R230: Key - what frequency? Is it Radioactive ?
Thread Starter
Junior Member
Joined: Sep 2006
Posts: 39
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From: Boston, MA
2021 s580, Past: 2020 BMW M8 Comp, 2018 BMW M5, 2015 BMW X5M, 2008 CL600, 2007 SL550
Key - what frequency? Is it Radioactive ?
I always wondered on which frequency does keyless systems' key work? If it were emitting a standard frequency signal, the batteries would drain very quickly because, as i understand, the key emits a signal constantly. My only explanations is that the key probably contains a radioactive element in it, which as you understand does not do us any good, especially if we carry a key in our pockets next to other valuable assets. Can anyone shed a little light on this issue?
Thank you.
Thank you.
MBWorld Fanatic!
Joined: Jul 2002
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From: UK
SL55 AMG
I think you are living in the land of the fairies.
The card/key only transmits when it receives a signal from the car. You grabbing the door handle starts the car transmitting and listening for the response from the key. When the key receives a signal, it wakes up and starts transmitting back to the car.
Ever noticed how the car unlocks if you are standing next to it and pour a glass of water over the door handle?
The card/key only transmits when it receives a signal from the car. You grabbing the door handle starts the car transmitting and listening for the response from the key. When the key receives a signal, it wakes up and starts transmitting back to the car.
Ever noticed how the car unlocks if you are standing next to it and pour a glass of water over the door handle?
MBWorld Fanatic!
Joined: Jul 2002
Posts: 2,447
Likes: 14
From: UK
SL55 AMG
Thread Starter
Junior Member
Joined: Sep 2006
Posts: 39
Likes: 0
From: Boston, MA
2021 s580, Past: 2020 BMW M8 Comp, 2018 BMW M5, 2015 BMW X5M, 2008 CL600, 2007 SL550
it seems that the car unlocks it you just stand near the door, without pouring water at it. Still the question remains - on what frequency does a key operate. Also, what is the expected lifetime of a key battery. Just curious.
P.S. should try that trick with a water bottle.
P.S. should try that trick with a water bottle.
