M-Class (W166) Produced 2012-2015

Liftgate Issue Continued............

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Old Oct 31, 2021 | 06:29 PM
  #1  
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2020 AMG GTC, 2021 Lexus LC500 Convertible, 2020 GLE350 4Matic, 2005 Honda S2000, 2005 Jeep Wrangler
Exclamation Liftgate Issue Continued............

The liftgate on my ml350 stopped working, so I ordered an aftermarket pair of struts assuming that was the issue. After replacing them, the liftgate still did not work. My local MB mechanic told me he almost never has had to replace the struts on this model and assumes it is something else.

After investigating further and when I press the button to close the liftgate, I can hear a click in a small box near the rear cargo area that I identified as the Liftgate Control Module (MB P/N: A1669006311). That has to be the issue since it clearly isn't struts, correct?

As usual, any help from you all is greatly appreciated.

Thank you!
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Old Oct 31, 2021 | 08:07 PM
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Originally Posted by pgolfco
The liftgate on my ml350 stopped working, so I ordered an aftermarket pair of struts assuming that was the issue. After replacing them, the liftgate still did not work. My local MB mechanic told me he almost never has had to replace the struts on this model and assumes it is something else.

After investigating further and when I press the button to close the liftgate, I can hear a click in a small box near the rear cargo area that I identified as the Liftgate Control Module (MB P/N: A1669006311). That has to be the issue since it clearly isn't struts, correct?

As usual, any help from you all is greatly appreciated.

Thank you!
Pieces of the system:
struts
latch
control module
front door button
liftgate exterior button
liftgate interior button
key fob button

Verify all the buttons create a reaction. New battery in the key fob. You have new struts.

It’s down to the latch or the module, if all of the buttons work from the test above. Have your mechanic scan with XENTRY. There will be codes or errors if the module is bad. Probably also if the latch is bad.

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Old Nov 1, 2021 | 08:03 AM
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ML 350 Bluetec
The module is what my mechanic suspects the issue to be as well.
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Old Nov 1, 2021 | 08:03 AM
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E270 cdi W211, E350 cdi W212, ML350 BlueTec W166
I had the same issue with my MY12 350 Buetec. I reset the tailgate control unit via Xentry, problem solved.
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Old Nov 1, 2021 | 08:09 AM
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Originally Posted by hyibin
I had the same issue with my MY12 350 Buetec. I reset the tailgate control unit via Xentry, problem solved.
That did not work on mine.
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Old Nov 1, 2021 | 08:21 AM
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E270 cdi W211, E350 cdi W212, ML350 BlueTec W166
Originally Posted by Don_CA
That did not work on mine.
In that case, you might need a new control unit.
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Old Nov 1, 2021 | 08:04 PM
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@pgolfco tell your mechanic to clear all codes with XENTRY and see if the problem goes away.
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Old Nov 1, 2021 | 10:53 PM
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2014 ML350BT
Had same problem after a battery change.. needed xentry to clear error code and was good to go
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Could you hear the motor in the strut running?
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