GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

2012 GL 450 Liftgate issue

Old 08-31-2014, 10:39 PM
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Gl 450
2012 GL 450 Liftgate issue

The gate opens from the outside but needs just a small boost before it takes over and opens on its own..if I try to open with the interior switch or remote, the motor buzzes but doesn't lift the gate. It shuts fine with any button but it does seem to shut somewhat hard just before its closed. Could this be weak liftgate struts?? or does it need a new motor. Any thoughts/suggestions appreciated.

Thanks
Old 09-09-2014, 09:14 AM
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You need a new latch, mine was just replaced under warranty. It's an easy fix once you have a new latch
Old 09-09-2014, 09:25 AM
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Originally Posted by xlr8tin
You need a new latch, mine was just replaced under warranty. It's an easy fix once you have a new latch
It does latch and unlatch just fine, it just needs an initial 'boost' to get it moving. Still think its the latch? Thanks
Old 09-09-2014, 10:56 AM
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Originally Posted by Apex1000
The gate opens from the outside but needs just a small boost before it takes over and opens on its own..if I try to open with the interior switch or remote, the motor buzzes but doesn't lift the gate. It shuts fine with any button but it does seem to shut somewhat hard just before its closed. Could this be weak liftgate struts?? or does it need a new motor. Any thoughts/suggestions appreciated.

Thanks


That does sound like struts (just guessing, but thinking logically)


Other thoughts could be some air in the hydraulic system or a weak pump or actuator.
Old 09-09-2014, 12:23 PM
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2008 GL320
If you are talking about that first few inches then I don't think the struts or motor are doing a lot of work down there. Think of the angle of the arm and force due to gravity.

It's about midway up that the motor has to work the hardest. Mine had trouble latching when I got it but it sounds like yours is having trouble un-latching properly. Maybe check the latch for plenty of grease. I also managed to get mine to latch manually while the door was at eye level (push the latch over till it clicks and then the motor pulls it in). You might try that and see how it unlatches when you reach around and actuate the handle. Maybe it could be fixed with some silicon grease? Just like above I am just trying to think through it logically.
Old 09-09-2014, 01:00 PM
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2007 W211 E350 4Matic / 2008 X164 GL320 CDI
Put a support under the hatch when open and pull off the struts. They should be hard to compress and feel about equal.


That would be a quick rule out of a single failed strut.
Old 09-09-2014, 01:04 PM
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Thanks guys..I'll try some grease then move on to checking the struts.
Old 09-09-2014, 01:19 PM
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Originally Posted by Apex1000
Thanks guys..I'll try some grease then move on to checking the struts.


It should not need much "grease".


I would probably use a light coat of white lithium grease or clear silicone lube (Super Lube).


As you try things, note any changes, as that might help point in the right direction.


Us owners of 6 to 8 year old GLs need to share the secrets to avoiding the dealers.

Last edited by N_Jay; 09-09-2014 at 02:48 PM.
Old 09-09-2014, 01:28 PM
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Originally Posted by N_Jay
It should not need much "grease".


I would probably use a light coat of white lithium grease or clear silicone lube (Super Lube).


As you try things, not any changes, as that might help point in the right direction.


Us owners of 6 to 8 year old GLs need to share the secrets to avoiding the dealers.
Agreed..I'm leaning towards a strut issue but will proceed step by step.

Thanks
Old 09-14-2014, 09:59 PM
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It was the latch..it didnt unlatch quick enough to allow the motor to lift the gate.

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