SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: The handle for the trunk lid does not work manually on my 2003 SL, R230

Old Mar 2, 2020 | 11:59 AM
  #1  
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350 SL, R230 - 300 SL, R129 - 1964 Corvette Sting Ray Sport Coupe - Porsche 911 Twin Turbo (sold)
The handle for the trunk lid does not work manually on my 2003 SL, R230

As i said the handle for the trunk lid does not work manually on my 2003 SL, R230

The remote works perfect and so does the opening button on the drivers side door. The mechanic key also works

It is only that i can not open the trunk lid using the only the handle when the car is not locked

Is it the lever that comes from the trunk lid handle that have popped off?
Also the button on the right hand side close to the trunk lid is pushed all the way in and stays there stuck

Below is a picture of the lever for the trunk lid handle





The knob marked with a red arrow on the picture below is pressed all the way in and is stuck in that position


Last edited by TheSaint; Mar 2, 2020 at 12:06 PM.
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Old Mar 2, 2020 | 03:25 PM
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Below is a picture of the lever for the trunk lid handle
yes it can, or the little plastic arm it goes on can break off




The knob marked with a red arrow on the picture below is pressed all the way in and is stuck in that position
different problem, try some WD40


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Old Mar 2, 2020 | 08:07 PM
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Originally Posted by TheSaint
Also the button on the right hand side close to the trunk lid is pushed all the way in and stays there stuck
That is not a button and isn't supposed to move. Frankly, I don't see how it could be pushed in without there existing considerable damage to the latch assembly.
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Old Mar 3, 2020 | 10:35 AM
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350 SL, R230 - 300 SL, R129 - 1964 Corvette Sting Ray Sport Coupe - Porsche 911 Twin Turbo (sold)
According to the owners manual the button does have a function. It is called trunk lock button in the owners manual
Check out the picture below



Below is a picture when you can see partly the backside of the locking assembly and it looks like the button/knob have a flat area on the backside hat might push against something

Behind the knob


Originally Posted by Rod_84
That is not a button and isn't supposed to move. Frankly, I don't see how it could be pushed in without there existing considerable damage to the latch assembly.

Last edited by TheSaint; Mar 3, 2020 at 10:51 AM.
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Old Mar 3, 2020 | 11:19 AM
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I can't help you, because your assembly is different from mine. With mine that isn't a button and wouldn't move if you hit it with a hammer. Difference between European and U.S. markets, I guess.
.
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Old Mar 3, 2020 | 12:09 PM
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I always though that was a plug for the hole where the backup camera would otherwise be installed. It really doesn't have any other function on my 07 SL550
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Old Mar 3, 2020 | 01:51 PM
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On my Euro SL that is just a fixed plastic blob.
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Old Mar 4, 2020 | 08:45 AM
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everybody can make mistakes
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Old Mar 4, 2020 | 08:49 AM
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  • The metal wire should be left on, its adjustable and is used for manually unlocking the trunk with the key.
  • The button is for keyless entry and is to be pressed if you have opened the trunk then when you close it can press the button to lock the car rather than using the remote that could be in your bag. There is also one on each door handle too.
  • Does your trunk lever work if you have the key in your pocket as well as if you are more than 3 m away with the key? I've noticed that if I used the spare key there is a delay when I Pull the lever, the trunk only manually opens with the key in my pocket after this delay, if I leave it more than 3 m away the keyless entry does not work and I cannot open the trunk. Therefore try changing keys.
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Old Mar 4, 2020 | 11:41 AM
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Originally Posted by A1EK
The button is for keyless entry...
Thanks. I've owned a Keyless Go car for a year and never realized that was a button.

A few days ago a friend was reinstalling his latch assembly and he had no idea where a little blue plug connected. Evidently that plug connects to the handle assembly of a KG car.
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Old Mar 20, 2020 | 12:56 PM
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350 SL, R230 - 300 SL, R129 - 1964 Corvette Sting Ray Sport Coupe - Porsche 911 Twin Turbo (sold)
My SL do not have keyless entry
I really can not understand how the button is pressed in this much on a my SL
The mechanical key and remote works perfect




From the pictures it looks to me like it should be impossible to push in that button on SL`s without keyless entry



Originally Posted by A1EK
  • The metal wire should be left on, its adjustable and is used for manually unlocking the trunk with the key.
  • The button is for keyless entry and is to be pressed if you have opened the trunk then when you close it can press the button to lock the car rather than using the remote that could be in your bag. There is also one on each door handle too.
  • Does your trunk lever work if you have the key in your pocket as well as if you are more than 3 m away with the key? I've noticed that if I used the spare key there is a delay when I Pull the lever, the trunk only manually opens with the key in my pocket after this delay, if I leave it more than 3 m away the keyless entry does not work and I cannot open the trunk. Therefore try changing keys.

Last edited by TheSaint; Mar 20, 2020 at 01:07 PM.
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Old Mar 20, 2020 | 01:12 PM
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Updated! The lever works

When i put the mechanical key in the lock on the trunk lid and turn the key to the left and pull the lever it works like a charm

I was sure that when the car is parked but not locked that you could open the trunk lid just by pressing the lever

But as i said when i put the mechanical key in and turn to the left the lever works as it it is supposed to

I have to say that it is strange that you have to put the mechanical key in the lock and turn to the left to have the trunk lid lever working

The only thing i find strange is that the mechanical key have to be put in the lock and also turned to the left for the lever to work

I just checked if i can take the mechanical key out of the lock after it is turned to the left but then the key is locked inside the lock


Turn the mechanical key to the left and the lever works so you can open the trunk lid

Last edited by TheSaint; Mar 20, 2020 at 01:36 PM.
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Old Mar 20, 2020 | 06:39 PM
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That is not as it should be. With the car unlocked the lever should act as an electric trigger for the lock. No motional feedback in the lever, and a slightly delayed *click* in the lock. Just like the switch in the drivers’ door.

Last edited by Frederick NL; Mar 20, 2020 at 06:52 PM.
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Old Mar 21, 2020 | 12:09 PM
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Frederick NL. That was what i thought.
When i put the mechanical key in the lock and turn left i can feel that the lever opens the trunk lid mechanical. I then feel a little resistance when pulling the leverWhen the car stand unlocked and i use no key there is no reaction from the trunk lid lever. It feels like you pull down the door handle on a door that is open. I can not feel any resistance when pulling the lever and you open the trunk lid at all when pulling the lever

Well, it is sunny outside and it is spring time so perhaps i will have a closer look at this tomorrow

Frederick NL. Just so i am sure. When the car is standing parked and unlocked (no remote or mechanical key) when you pull the lever it is an electric lock that opens the trunk lid? So there should be no resistance when pulling the lever right?
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Old Mar 21, 2020 | 12:57 PM
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That is what it feels like. Locked or unlocked, no different feel. Be as patient as you need to be with the trunk switch in the door. And with the trunk button on the remote.
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Old Mar 21, 2020 | 06:20 PM
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Originally Posted by Frederick NL
That is not as it should be. With the car unlocked the lever should act as an electric trigger for the lock. No motional feedback in the lever, and a slightly delayed *click* in the lock. Just like the switch in the drivers’ door.


Perhaps it is because of the button that is pressed all the way in? Talking about the button for keyless go SL`s

I will take off the door lock assembly and check this
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Old Mar 22, 2020 | 04:48 AM
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Does your central locking work? Does the boot lid pull itself down more fully after you have closed it?

I wouldn’t rule out a vacuum problem on the boot lock yet. I had a PSE pump failure and my boot experienced the same issue. It was obvious to me though because every time I shut it, although it clicked it did not pull itself tight.

What does yours do when you close the boot?
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Old Apr 10, 2020 | 12:21 PM
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matk. The boot lids closes as it is supposed to do. I do not think the boot lid pulls it self down more fully after i close it.

If i take out the mechanical key, put that in the boot lid lock and turn it to the left the boot lid handle works as it is supposed to. That i can not understand.
Thinking that if there was any PSE pump failure on my car i guess i would not be able to turn the mechanical key to the left and have the lever working?

Then is the thing with the knob stuck pushed all the way in

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Old Apr 10, 2020 | 12:39 PM
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There is one more thing. When i have the car parked unlocked and use the boot lid switch on the drivers side door to open the boot lid i have to be really fast to open the trunk otherwise it closes or is half closed while the door button have the red light lit
When i use the door switch and the red light comes on the switch the trunk lid is somehow "halfway" open and i will have to use the remote or the mechanical key to open the lid

I just read in the owners manual when using the trunk lid switch on the door the red light is supposed to be lit until i close the trunk.
But often when i use try to use the door switch the trunk opens and i go behind to lift up the lid and then it is is locked again and the red light have gone out on the door switch

I was thinking of taking off the plastic plate that sits with plastic knobs and the carpet on the underside of the lid and check this but i rather wait until to morrow

As i said earlier when the car is parked unlocked and i i use the mechanical key and turn it to the left i can feel a little resistance in the lever and the lever works perfect.
If i only try to open the lid using the lever there is no resistance at all and nothing happens

Last edited by TheSaint; Apr 10, 2020 at 12:48 PM.
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Old Apr 10, 2020 | 02:32 PM
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Just back in after doing some checking.
I took off the plastic cover that sits on the trunk lid to see if i could see anything wrong
There is a blue connector on the wire harness that is hanging loose and not connected to anything (see the picture below)

I wrote that i have to be fast to open the trunk lid using the switch on the drivers door. But if the car is running on idle i do not have to hurry

When the car was running on idle i tried to open the trunk lid and when i pulled the lever i heard the sound of an electric motor starting. I let the lever go and tried the lever again but this time i could not hear any electric motor so i think there must be a bad connection in the trunk lid
It is to late in the evening to start checking that now so i will look at it tomorrow or during the weekend

Thanks for all help




The blue connector the red arrow is pointing to is not connected


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Old Apr 10, 2020 | 06:03 PM
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I have that blue connector, which I believe is for a backup camera, which mine does not have.
Do you have a backup camera? If so, my theory is all wrong. Let me know.

I also have the same problem with my driver door release only releasing the trunk halfway:
And my truck handle does not release the trunk latch with the electric micro-switch (when unlocked).
My key remote releases the trunk fine. And the key in the trunk will allow the mechanical rod to release the trunk.
But my trunk handle does do release the trunk. Still working on the fix, which sounds the same as yours.
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Old Apr 11, 2020 | 08:12 AM
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Check your PSE pump and hose/line first

Originally Posted by TheSaint
matk. The boot lids closes as it is supposed to do. I do not think the boot lid pulls it self down more fully after i close it.

If i take out the mechanical key, put that in the boot lid lock and turn it to the left the boot lid handle works as it is supposed to. That i can not understand.
Thinking that if there was any PSE pump failure on my car i guess i would not be able to turn the mechanical key to the left and have the lever working?

Then is the thing with the knob stuck pushed all the way in
The soft close functions are controlled by the sensors that detect the position that the trunk is in
If yout PSE pump has an internal leak or the hose/line to the trunk locking machanism is leaking it will not function correctly

Go to your PSE pump in the trunk located below the Vario roof hydraulic pump
I have marked the yellow hoses with different color tie wraps as you can see in the attached picture
Pull the 2 electric connectors from the PSE pump
Disconnect the yellow hose from the "HECK" connector and use a Mighty Vac on the hose that goes to the trunk lock if it holds vacuum than your trunk lock is fine.
Now connect the Mighty Vac to "Heck" port on the PSE pump and if it holds vacuum than the PSE pump is fine

If any one of them fail to hold vacuum than that's were your problem comes from ones fixed
Taking the PSE pump or truck lock actuator apart is a different chapter

LOL

Best H


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Old Apr 13, 2020 | 07:05 PM
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kbob999 wrote: I have that blue connector, which I believe is for a backup camera, which mine does not have.
Do you have a backup camera? If so, my theory is all wrong. Let me know

I am pretty sure that there are no wires for a back up camera on my 2003 SL but if it is a friend of mine will be happy since he have a 2004 SL if the connector is for a back up camera he can use the wires to retrofit the back up camera (camera on the left side license plate lens) he has ordered for is SL. Note that he have a modern 2 DIN Pioneer unit installed



Hendrik Koster. Thanks for posting

Last edited by TheSaint; Apr 13, 2020 at 07:11 PM.
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Old Jun 30, 2020 | 06:49 PM
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How do I first remove the trunk lid handle from the trunk? I am starting to curse like Yosemite Sam trying to figure it out.

Last edited by Swamp_Fox; Jul 1, 2020 at 02:28 PM.
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Old Jul 1, 2020 | 03:55 PM
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Plastic cover removal?

I see the two torque bolts on the other side of the handle holding the trunk handle on but they are covered by a plastic piece on the outside above the license plate. How do you remove that plastic cover to get to the bolts? It appears the facing number plate (lower section of the trunk lid from the seam down) needs to be removed. I have removed 3 small bolts at the bottom holding the inner structure to the facing number place so it is loose at the bottom but still holding from the top at the seam to the upper part of the trunk lid. How is it further removed? . Push the facing number plate down? Pry up?

Last edited by Swamp_Fox; Jul 1, 2020 at 06:45 PM. Reason: more information
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