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W212 - OBD Port Not Working - Drive Mode Selector Not Working *FIX*

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Old 11-18-2021, 03:47 PM
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C63 W204 / E63S W212 / E63S W212
W212 - OBD Port Not Working - Drive Mode Selector Not Working *FIX*
Hello everyone,

Recently I came across a small issue where the OBD port had no power along with dead drive mode selector and the 3 buttons below it. The issue was a blown fuse which goes in to the slot numbered 73 in the fuse box. The location of this fuse box is in the trunk right next to the first aid kit compartment (passenger side), its just a cutout in the liner no labels or a handle. It is a 5amp fuse and can be easily found at any autoparts store. This problem will not throw a error code, just sets everything to comfort by default.




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Old 11-18-2021, 05:01 PM
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Good to know! Thanks for the info!
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Old 11-18-2021, 05:44 PM
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Originally Posted by Rehabguy
Good to know! Thanks for the info!
Anytime!
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Old 11-19-2021, 11:11 AM
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Awesome! Why did it blow??
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Old 11-19-2021, 04:40 PM
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Originally Posted by PeterUbers
Awesome! Why did it blow??
Was trying to test a new obd scanner, plugged it in and the fuse blew. After replacing the fuse it hasn't happened again.
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Old 11-19-2021, 08:44 PM
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2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
Originally Posted by timm206
Was trying to test a new obd scanner, plugged it in and the fuse blew. After replacing the fuse it hasn't happened again.
so weird ... I wonder if trying to shove it in it shorted
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Old 11-23-2021, 10:48 AM
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Originally Posted by PeterUbers
so weird ... I wonder if trying to shove it in it shorted
Could be my fault honestly though i was pretty careful or the scanner is faulty somehow.
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Old 11-23-2021, 02:27 PM
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Good info. My mode selector and buttons randomly stopped working once, but power cycling the car restored them to operating.
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