Keyless Go - without ignition button
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From: Sidney, BC
2009 SLK55 AMG. & 2022 GLA250 4Matic
No keyless go equipped car starts without your foot on the brake. I wanted you to see that your KG button had additional functions with YOUR FOOT OFF THE BRAKE. You never did what I asked you to do did you?
You spew lots of misinformation in this thread and these cars are mostly born equal unless you are the buyer it appears.
You spew lots of misinformation in this thread and these cars are mostly born equal unless you are the buyer it appears.
I don't need a lecture from you pal.
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From: Toronto
MY17 E43 Matte Selenite/Macchiato Beige, MY16 GLE350d Tenorite/Crystal Grey, MY17 B250
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Fair enough, but if you know so much without reading the manuals of all of your multi benzs you should not try to educate new owner's with false information. I have yet to hear another KG owner who can get their car to lock by simply walking away from it.
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From: Houston, TX
2014 E550 Coupe and 2010 E350 Sedan
The closest functionality I know of can be set from the settings on gauge cluster, in which there is an automatic lock, but I believe it is based on time, not key fob distance.
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From: MA
'24 Porsche Macan
I think that's the automatic lock when driving off (e.g. speed greater than 9 mph or 15 km/h).
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
The automatic lock in the cluster menu is only for the locking function when you start driving. When your speed is at about 7 mph the doors will lock.
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From: North Scottsdale, AZ
'71 Pinto
Automatic central locking activates when vehicle is in motion (approximately 9 mph) you use lock/unlock buttons to activate/deactivate, submenu to turn feature on/off.
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From: Sidney, BC
2009 SLK55 AMG. & 2022 GLA250 4Matic
OK
Ok, so I have to eat some crow and apologize for my comments.
I found the article that suggested the system would lock the doors if the key was taken some distance away from the car. It was not MB specific so I erred. My apologies. The loss of signal is not programmed into these cars but I wonder if it can be.
As to the auto lock, I think you would agree that there is an element of that involved. If the car is locked, you put your hand behind the handle with your key in your pocket or touch the pad the doors will unlock. IF you do not open the door the doors will relock automatically. Mine takes about 30 sec to do so
As to the button there is more to it than being a button. I misunderstood your three function comment.
Yes if you push it once it will turn on the IP and allow the Comand to start. And if you push it a second time the function light test on the IP comes up and of course the third push with foot on the brake starts the car.
However, if you push a soft blunt rod into the slot for the key or button with the key in your pocket, the flap moves in on the left side but nothing happens. The system needs to match the rolling code established when the car is shut off which as I have been told is done through electronic connection between the ignition switch and the key. With the key in your pocket there has to be an RF match between the key and the button to do that would it not?
I found the article that suggested the system would lock the doors if the key was taken some distance away from the car. It was not MB specific so I erred. My apologies. The loss of signal is not programmed into these cars but I wonder if it can be.
As to the auto lock, I think you would agree that there is an element of that involved. If the car is locked, you put your hand behind the handle with your key in your pocket or touch the pad the doors will unlock. IF you do not open the door the doors will relock automatically. Mine takes about 30 sec to do so
As to the button there is more to it than being a button. I misunderstood your three function comment.
Yes if you push it once it will turn on the IP and allow the Comand to start. And if you push it a second time the function light test on the IP comes up and of course the third push with foot on the brake starts the car.
However, if you push a soft blunt rod into the slot for the key or button with the key in your pocket, the flap moves in on the left side but nothing happens. The system needs to match the rolling code established when the car is shut off which as I have been told is done through electronic connection between the ignition switch and the key. With the key in your pocket there has to be an RF match between the key and the button to do that would it not?
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Hey Alex. Thanks for coming back and sharing your observations. Yes, the doors will auto lock if you do not open a door in a certain amount of time. This is common with all car manufacturers that I know and has been a standard for many years. It is there to prevent an inadvertent pressing of the unlock button on the fob to protect your vehicle and its contents.
Thank you for checking to see that the button has additional uses other than to just start the car. If you want to adjust settings you can do this without having to start the car by pressing the button twice to energize the controls. i do this often as I am checking tire pressures and other options without running the car.
You are absolutely correct about the key making its authorized connection to the starter switch in the car. My knowledge of the button's function though still is different from yours. If you pull it out and look at it you will see that it has a spring loaded pushing function and tabs that secure it when inserted into the key slot. What it doesn't have, to the best of my knowledge, is any electronic guts that relay any information from the key to the starter switch.
This authorization from the key to the starter switch is enabled as soon as the key enters the car and is recognized.
Thank you for checking to see that the button has additional uses other than to just start the car. If you want to adjust settings you can do this without having to start the car by pressing the button twice to energize the controls. i do this often as I am checking tire pressures and other options without running the car.
You are absolutely correct about the key making its authorized connection to the starter switch in the car. My knowledge of the button's function though still is different from yours. If you pull it out and look at it you will see that it has a spring loaded pushing function and tabs that secure it when inserted into the key slot. What it doesn't have, to the best of my knowledge, is any electronic guts that relay any information from the key to the starter switch.
This authorization from the key to the starter switch is enabled as soon as the key enters the car and is recognized.
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Joined: Apr 2013
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From: Sidney, BC
2009 SLK55 AMG. & 2022 GLA250 4Matic
Keyless Go
There is a certain logic to that argument. The issue for me is when I look at the key slot it looks exactly the same as my 2009 W211 and my 2003 W211.
It all works.
I am going to explore whether the car can be programmed to auto lock on loss of radio signal from the key. Not sure if I would do it but curious to know.
It all works.
I am going to explore whether the car can be programmed to auto lock on loss of radio signal from the key. Not sure if I would do it but curious to know.
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Hey Alex. Thanks for coming back and sharing your observations. Yes, the doors will auto lock if you do not open a door in a certain amount of time. This is common with all car manufacturers that I know and has been a standard for many years. It is there to prevent an inadvertent pressing of the unlock button on the fob to protect your vehicle and its contents.
Thank you for checking to see that the button has additional uses other than to just start the car. If you want to adjust settings you can do this without having to start the car by pressing the button twice to energize the controls. i do this often as I am checking tire pressures and other options without running the car.
You are absolutely correct about the key making its authorized connection to the starter switch in the car. My knowledge of the button's function though still is different from yours. If you pull it out and look at it you will see that it has a spring loaded pushing function and tabs that secure it when inserted into the key slot. What it doesn't have, to the best of my knowledge, is any electronic guts that relay any information from the key to the starter switch.
This authorization from the key to the starter switch is enabled as soon as the key enters the car and is recognized.
Thank you for checking to see that the button has additional uses other than to just start the car. If you want to adjust settings you can do this without having to start the car by pressing the button twice to energize the controls. i do this often as I am checking tire pressures and other options without running the car.
You are absolutely correct about the key making its authorized connection to the starter switch in the car. My knowledge of the button's function though still is different from yours. If you pull it out and look at it you will see that it has a spring loaded pushing function and tabs that secure it when inserted into the key slot. What it doesn't have, to the best of my knowledge, is any electronic guts that relay any information from the key to the starter switch.
This authorization from the key to the starter switch is enabled as soon as the key enters the car and is recognized.
you say you check tire pressure by just pressing the start button without starting it. I understand you drive a 2010 E550 like I do.
In my car when I go to tire pressure right after I start up and start driving I get the message saying that tire pressure will be available after a few minutes of driving, which is true. It actually takes only a minute or so.
You know if they changed this behavior on later 2010 models? Mine was built in June 2009.
Last edited by Arrie; Dec 15, 2014 at 02:28 PM.
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From: Sidney, BC
2009 SLK55 AMG. & 2022 GLA250 4Matic
Tire Pressures
I don't check my pressures in the system all that often. I usually check them manually with a gauge once a month and then reset the system after about 15 minutes of driving. From there I use it as an early warning device.
It is logical they may have built in a delay so that the tire comes up to operating temperature before it checks.
It is logical they may have built in a delay so that the tire comes up to operating temperature before it checks.
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From: N. TX
2013 Lexus ES300h
Why would you consider checking tire pressure after driving as "logical", when you are supposed to adjust the pressure when "cold"? After you start driving, the pressure "is what it is" & those cold pressure settings are specified to compensate for that heating while driving. Being in the sun will also cause variations. After driving, the readings are available so you can tell if something gets out of whack. If the tires are inflated for the specified readings when "hot", they are underinflated.
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From: Vancouver, BC
2015 E250 BT 4M
I don't check my pressures in the system all that often. I usually check them manually with a gauge once a month and then reset the system after about 15 minutes of driving. From there I use it as an early warning device.
It is logical they may have built in a delay so that the tire comes up to operating temperature before it checks.
It is logical they may have built in a delay so that the tire comes up to operating temperature before it checks.
Instead, the TPMS on Canadian vehicles relies on rotational differences in speed to determine if a tire is losing pressure. When that occurs, a "check tire pressures soon" message will flash in red or a even more alarming warning will occur in the event of a major loss in pressure. After a loss of tire pressure has been restored, then a short drive is required to reset the TPMS.
Maybe it's time to get back to the OP's thread on Keyless Go ?
Last edited by DerekACS; Dec 15, 2014 at 07:26 PM.
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From: Sidney, BC
2009 SLK55 AMG. & 2022 GLA250 4Matic
Tire Pressures
I didn't make myself clear.
We have to set pressures manually and the system monitors pressure loss as DerekASC has noted. We do not get an absolute pressure reading.
My point was that since you set pressures cold perhaps your TPMS waits for the pressures to stabilize at road temperatures before becoming available.
We have to set pressures manually and the system monitors pressure loss as DerekASC has noted. We do not get an absolute pressure reading.
My point was that since you set pressures cold perhaps your TPMS waits for the pressures to stabilize at road temperatures before becoming available.
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Not sure if you understand the type of TPMS that is installed in Canadian production MBs (W204/05 & W211/212) ? Unlike the US MBs, our cars do not have electronic sensors that measure the individual pressures of all four tires. Therefore, you cannot call up via command to 'read' the pressures of all four tires.
Instead, the TPMS on Canadian vehicles relies on rotational differences in speed to determine if a tire is losing pressure. When that occurs, a "check tire pressures soon" message will flash in red or a even more alarming warning will occur in the event of a major loss in pressure. After a loss of tire pressure has been restored, then a short drive is required to reset the TPMS.
Maybe it's time to get back to the OP's thread on Keyless Go ?
Instead, the TPMS on Canadian vehicles relies on rotational differences in speed to determine if a tire is losing pressure. When that occurs, a "check tire pressures soon" message will flash in red or a even more alarming warning will occur in the event of a major loss in pressure. After a loss of tire pressure has been restored, then a short drive is required to reset the TPMS.
Maybe it's time to get back to the OP's thread on Keyless Go ?
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Joined: Mar 2007
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From: Vancouver, BC
2015 E250 BT 4M
I didn't make myself clear.
We have to set pressures manually and the system monitors pressure loss as DerekASC has noted. We do not get an absolute pressure reading.
My point was that since you set pressures cold perhaps your TPMS waits for the pressures to stabilize at road temperatures before becoming available.
We have to set pressures manually and the system monitors pressure loss as DerekASC has noted. We do not get an absolute pressure reading.
My point was that since you set pressures cold perhaps your TPMS waits for the pressures to stabilize at road temperatures before becoming available.
Last edited by DerekACS; Dec 15, 2014 at 10:38 PM.
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From: Vancouver, BC
2015 E250 BT 4M
Yes, it's a much simpler system that relies upon change in rotation speeds. A deflating or flat tire rotates slightly slower than a properly inflated tire. The sensors, incorporated with the brakes, are designed to measure this difference, then signal this change to the driver with a 'red' dash warning.
Last edited by DerekACS; Dec 15, 2014 at 10:41 PM.
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From: BC
G11 750i Individual, X166 GL550 Designo, W222 S550e, W221 S63
It's true for Canadian models. When the system detects a loss in tire pressure, the instrument cluster beeps and reads "Check tire pressure" in red. We cannot get an individual pressure reading for each tire like in the American models.
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Yes, it's a much simpler system that relies upon change in rotation speeds. A deflating or flat tire rotates slightly slower than a properly inflated tire. The sensors, incorporated with the brakes, are designed to measure this difference, then signal this change to the driver with a 'red' dash warning.
Wonder how it works for a housewife who don't know that a sudden temperature drop of say 30 C can severely under inflate all tires. This system would have hard time to know all tires are low.
