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Drivers door switch group not working

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Old Mar 23, 2021 | 01:17 PM
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24 GLS580 '23 E450 4matic 12 E350 4Matic
Talking Drivers door switch group not working

So I went out this morning and left in my '13 E350 fourmatic. the drivers side door window switches and mirror switches are not working, all the other window buttons on the other three doors are working fine, door lock works, trunk open and close works too.

I scanned for codes and get: C21500-communication with switch group of control unit door has a malfunction. Do I order a switch or check first to see if the plug on the switch is loose?
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Old Mar 23, 2021 | 01:34 PM
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2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
Originally Posted by pierrejoliat
Do I order a switch or check first to see if the plug on the switch is loose?
Check first, and then if no loose or damaged wiring you buy a new master switch.
Anyway u need to dismantle the door card, be it wire inspection or new replacement master switch

Below probably is very similar, C class
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Old Mar 23, 2021 | 01:41 PM
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You can try pulling f2 (30A) @ front SAM (engine compartment) to attempt door CU reset. If you need to inspect wiring:





Last edited by konigstiger; Mar 23, 2021 at 01:49 PM.
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Old Mar 23, 2021 | 01:50 PM
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24 GLS580 '23 E450 4matic 12 E350 4Matic
Thank you, tried the fuse reset first, didn't work so pulled the switch and it started working, lit up and every function back!
Must have been loose connection, so pulled connector and reseated connector, it clicked in and is now fully functional!!!!!!

Thank you both for the quick response, much appreciated!
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Old Mar 23, 2021 | 01:56 PM
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aha.... bad contact
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Old Mar 23, 2021 | 01:57 PM
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24 GLS580 '23 E450 4matic 12 E350 4Matic
Talking

Originally Posted by S-Prihadi
Check first, and then if no loose or damaged wiring you buy a new master switch.
Anyway u need to dismantle the door card, be it wire inspection or new replacement master switch

Below probably is very similar, C class
https://youtu.be/f6pE7wW7lFw
Originally Posted by konigstiger
You can try pulling f2 (30A) @ front SAM (engine compartment) to attempt door CU reset. If you need to inspect wiring:



Excellent, thank you both!
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