Remote window operation.
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Joined: Jan 2011
Posts: 571
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From: Redding, CA
'85 190D , '12 E350 BlueTec, '13 GLK 250 BlueTec
The reason they use infrared and 'line of sight' is that many people carry their keys in their pocket. Should you inadvertently put your hand or other things in your pocket that could push the buttons on the fob, you might roll down your windows without knowing it. What good would a locked car door do if the window is open?
Thread Starter
Senior Member
Joined: Jul 2011
Posts: 308
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From: Tennessee, USA
Red GLK350, blue '87 Toyota Land Cruiser
That's exactly what bop11 said. However since you have to push and hold the button down to open the windows it's unlikely it would happen by accident plus the horn beeps every time the button is pushed.
Super Member
Joined: Jan 2011
Posts: 571
Likes: 17
From: Redding, CA
'85 190D , '12 E350 BlueTec, '13 GLK 250 BlueTec
Not quite what he said.
My horn doesn't sound when I push any buttons. In fact, I've never heard my horn! Could something be wrong with your system and remote?
My horn doesn't sound when I push any buttons. In fact, I've never heard my horn! Could something be wrong with your system and remote?
Newbie
Joined: Jun 2010
Posts: 14
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2013 GLK 350
horn sounding on locking the door/alarm arming is an option that can be selected to be "on or off (meaning sound horn, or don't sound horn) in your car setup menu.
I can remember the menu it's under, I can look on the way home from work...
I can remember the menu it's under, I can look on the way home from work...
Member
Joined: Aug 2012
Posts: 130
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GLK250 BT
Senior Member
Joined: Aug 2009
Posts: 361
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From: Maryland
2014 GLK250 BlueTEC, 2012 BMW 335is Conv.
Agree. The lock and unlock features are indeed RF so it is entirely possible to inadvertently unlock your car should something in your pocket press the button while you're within range of the car. That is unlikely to happen but it's actually more likely to happen than accidentally opening the windows since you have to hold the button to open the windows while unlocking the door(s) requires only a single press. I say "door(s)" with the optional S because it could be all doors or just the driver's door depending on how you have the settings configured in the car.
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Joined: Sep 2012
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From: Ottawa ON Canada
2015 ML350 Bluetec
Ha! Just thought I'd throw my wrench into this with another detail. Ever opened the tailgate(remotely) while the vehicle is locked. You can.... and play around with the insides/ load your groceries, etc. Now close the tailgate...! The horn (if activated/see above post(Gt Dane))) will beep the standard 3 times telling you your vehicle is now safely alarmed/locked again. You would think that opening the tailgate without deactivating/unlock alarm/doors would start the alarm!!! I have yet to try opening a rear door from the inside in that senario to see if the alarm would start up!
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Senior Member
Joined: Aug 2009
Posts: 361
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From: Maryland
2014 GLK250 BlueTEC, 2012 BMW 335is Conv.
I wouldn't think that. If the car is locked and you use the key to open the tailgate (either by pressing the button or having the key on you and using Keyless Go), you are telling the car that you are an "authorized user" because you have the key.
Thread Starter
Senior Member
Joined: Jul 2011
Posts: 308
Likes: 4
From: Tennessee, USA
Red GLK350, blue '87 Toyota Land Cruiser
Ha! Just thought I'd throw my wrench into this with another detail. Ever opened the tailgate(remotely) while the vehicle is locked. You can.... and play around with the insides/ load your groceries, etc. Now close the tailgate...! The horn (if activated/see above post(Gt Dane))) will beep the standard 3 times telling you your vehicle is now safely alarmed/locked again. You would think that opening the tailgate without deactivating/unlock alarm/doors would start the alarm!!! I have yet to try opening a rear door from the inside in that senario to see if the alarm would start up!
Newbie
Joined: Jun 2010
Posts: 14
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2013 GLK 350
