Keyless go problem
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Joined: Jun 2009
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GL 450
Keyless go problem
I have keyless go in my 07 GL450, I can no longer lock/unlock door from the driver side and passenger side at the second row, however it works from the front passenger side and the door behind the passenger side. Any quick fix without taking it to the dealer?
Thread Starter
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Joined: Jun 2009
Posts: 130
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GL 450
If battery was weak then it wouldn't work at all. I don't see a problem from front passenger and rear passenger door, it just doesn't work from driver side and passenger door from behind the driver seat. I even used a second set of key and problem followed. I suspect that door handle switch which is connected to rear door KG control module is messed up. Ideas?
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Joined: Nov 2006
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From: NYC
2007 GL450
It's the door handle, had the same problem with driver side rear door, had it replaced under warranty at dealership. When i used to have the E500 had the same problem on my driver door, ordered the part from the dealer and replaced the handle myself. Took me 15 minutes to swap the door handle. I'm assuming cant be much harder on a GL.
Last edited by englebenz; May 25, 2011 at 12:28 PM.
Newbie
Joined: Nov 2006
Posts: 9
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From: NYC
2007 GL450
there is one keyless receiver for each side of the car that controls both doors, that may have gone bad, may have to replace that unit. on my old car (E500) the receiver was behind the rear door panels, i'm assuming the same for GL. If you have time you can take off the inside panel off the rear door and look for it, it's a small box about 2-4 inches long and wide. Worth a try if you want to avoid the dealership.
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GL 450
Found it from an older post on a forum. How keyless go works
How KG functions…
Unlock request:
- With key present, switch on inside of driver’s door is activated
- Door handle switch is connected to the rear door KG control module
- Rear door KG control module communicates request to EIS
- EIS transmits command signal to left rear door KG control module
- Left rear door KG control module uses antenna to send a RF signal to wake up the KG key
- Key within range wakes up
- Key transmits authorization code via RF
- RF signal is received by rear window antenna (connected to right antenna amplifier module)
- Right antenna amplifier module send signal to rear KG module
- Rear KG module sends key data to EIS
- EIS provides KG authorization
- EIS generates an “unlock” command plus a signal to left rear door KG control module to open driver’s door when handle is pulled
Interior Compartment Module (located behind ashtray) antenna confirms that key is inside vehicle.
The KG key includes a chip card function and the LED flashes when key responds to a wake-up request.
The Brake Switch signal is required when starting the engine.
The unlock/lock key buttons use IR (infrared) signal whereas KG uses RF (radio).
How KG functions…
Unlock request:
- With key present, switch on inside of driver’s door is activated
- Door handle switch is connected to the rear door KG control module
- Rear door KG control module communicates request to EIS
- EIS transmits command signal to left rear door KG control module
- Left rear door KG control module uses antenna to send a RF signal to wake up the KG key
- Key within range wakes up
- Key transmits authorization code via RF
- RF signal is received by rear window antenna (connected to right antenna amplifier module)
- Right antenna amplifier module send signal to rear KG module
- Rear KG module sends key data to EIS
- EIS provides KG authorization
- EIS generates an “unlock” command plus a signal to left rear door KG control module to open driver’s door when handle is pulled
Interior Compartment Module (located behind ashtray) antenna confirms that key is inside vehicle.
The KG key includes a chip card function and the LED flashes when key responds to a wake-up request.
The Brake Switch signal is required when starting the engine.
The unlock/lock key buttons use IR (infrared) signal whereas KG uses RF (radio).
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Newbie
Joined: May 2018
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GL450 2009
Keyless Go work only on rear left/right row not front driver/passenger row
I have the opposite problem with a Mercedes Benz GL450 2009. From outside the vehicle I cannot unlock from front driver or front passenger by pressing the button on the handle, but both side on second row I can unlock.
What is common for the first row versus the second row? For example, do we have a dedicated CAM cable for that front row that handle signal from the keyless go antenna of both side (front row)? Where is it?
What is common for the first row versus the second row? For example, do we have a dedicated CAM cable for that front row that handle signal from the keyless go antenna of both side (front row)? Where is it?
Last edited by SebTardif; May 11, 2018 at 01:34 PM.
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I have the opposite problem with a Mercedes Benz GL450 2009. From outside the vehicle I cannot unlock from front driver or front passenger by pressing the button on the handle, but both side on second row I can unlock.
What is common for the first row versus the second row? For example, do we have a dedicated CAM cable for that front row that handle signal from the keyless go antenna of both side (front row)? Where is it?
What is common for the first row versus the second row? For example, do we have a dedicated CAM cable for that front row that handle signal from the keyless go antenna of both side (front row)? Where is it?
new door handles are fairly cheap and 30 mins tops to replace.
Newbie
Joined: Dec 2021
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GL450
hi,
i have a 2012 GL450 that doesn´t have KG and the keyfobe just work by IR and when the liftgate is open and i point the keyfobe to the rear parking sensor the keyfobe lock and unlock the car normally, any thoughts on this issue?
rgds
i have a 2012 GL450 that doesn´t have KG and the keyfobe just work by IR and when the liftgate is open and i point the keyfobe to the rear parking sensor the keyfobe lock and unlock the car normally, any thoughts on this issue?
rgds
