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

Auto-Lights Inoperative

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Old 04-10-2015, 10:50 AM
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2007 W211 E350 4Matic / 2008 X164 GL320 CDI
Auto-Lights Inoperative

Received the "Auto-Lights Inoperative" message after having an alternator fail.
Local indy shop says it is probably the module on the windshield as it is showing "no-communications" per their Star system.

How much is that module? Anyone know the proper name or part number?


EDIT:
Found the module 1648203085
About $155 to $200


Can't seem to find any instructions on replacing it.
Some people say it is bonded to the windshield, other say not.

Last edited by N_Jay; 04-10-2015 at 11:34 AM.
Old 04-21-2015, 08:43 PM
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2007 W211 E350 4Matic / 2008 X164 GL320 CDI
The fix!

It was the module.
Got one off eBay for $50.


A little tricky to install if you don't know the secret.
Attached Thumbnails Auto-Lights Inoperative-1.jpg   Auto-Lights Inoperative-2.jpg   Auto-Lights Inoperative-3.jpg  

Last edited by N_Jay; 04-21-2015 at 08:46 PM.
Old 04-21-2015, 08:44 PM
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2007 W211 E350 4Matic / 2008 X164 GL320 CDI
And the secret
Attached Thumbnails Auto-Lights Inoperative-4.jpg   Auto-Lights Inoperative-5.jpg   Auto-Lights Inoperative-6.jpg   Auto-Lights Inoperative-7.jpg   Auto-Lights Inoperative-8.jpg  


Last edited by N_Jay; 04-21-2015 at 08:48 PM.
Old 06-06-2015, 03:41 PM
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GL 450, C 300
Exact Same problem.

Originally Posted by N_Jay
And the secret
Is the secret breaking the windshield? I hope there's a better solution!
Old 06-06-2015, 10:55 PM
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2007 W211 E350 4Matic / 2008 X164 GL320 CDI
Originally Posted by Attikis
Is the secret breaking the windshield? I hope there's a better solution!
Pushing the little taps in just enough but not too far.


Obviously the guy I bought it from did not know the secret.


Looks carefully at the pictures.
Old 11-18-2015, 12:30 AM
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E55 / S550 4-Matic / GL450 / ML350 / SL500
before you get crazy try unpluging it and then repluging it while the car is off and all doors closed.
Old 11-19-2015, 12:27 AM
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2007 W211 E350 4Matic / 2008 X164 GL320 CDI
Originally Posted by Tonypjr
before you get crazy try unpluging it and then repluging it while the car is off and all doors closed.


Yep, tried that.
No go!
Old 04-07-2017, 04:21 PM
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slk 230 , E 300
Well done.

I am getting the same message for my E300 W212. Can anyone help me with part number so I can also find the right part and replace it. Thanks

Originally Posted by N_Jay
Received the "Auto-Lights Inoperative" message after having an alternator fail.
Local indy shop says it is probably the module on the windshield as it is showing "no-communications" per their Star system.

How much is that module? Anyone know the proper name or part number?

I am I am

EDIT:
Found the module 1648203085
About $155 to $200


Can't seem to find any instructions on replacing it.
Some people say it is bonded to the windshield, other say not.
Old 04-07-2017, 06:41 PM
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2007 W211 E350 4Matic / 2008 X164 GL320 CDI
It is attached to the windshield under the cover behind the mirror.

Carefully take the cover off, and you should find a sticker with the part number.

I don't know about the W212, but the W/X164 releases from the windshield by pressing in two small rectangular slides. (see post #3)
Old 11-14-2021, 08:30 AM
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In the market
Originally Posted by Tonypjr
before you get crazy try unpluging it and then repluging it while the car is off and all doors closed.

That resolved my issue.

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