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

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Old Nov 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 Nov 18, 2021 | 05:01 PM
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E63S
Good to know! Thanks for the info!
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Old Nov 18, 2021 | 05:44 PM
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C63 W204 / E63S W212 / E63S W212
Originally Posted by Rehabguy
Good to know! Thanks for the info!
Anytime!
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Old Nov 19, 2021 | 11:11 AM
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Awesome! Why did it blow??
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Old Nov 19, 2021 | 04:40 PM
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C63 W204 / E63S W212 / E63S W212
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 Nov 19, 2021 | 08:44 PM
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
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 Nov 23, 2021 | 10:48 AM
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C63 W204 / E63S W212 / E63S W212
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 Nov 23, 2021 | 02:27 PM
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2014 E63s
Good info. My mode selector and buttons randomly stopped working once, but power cycling the car restored them to operating.
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