Clear CEL
Thread Starter
Junior Member
Joined: Dec 2015
Posts: 53
Likes: 11
From: Westchester County NY
2020 E350, 2019 GLC 300
Clear CEL
Was wondering if there is an easy way to clear the CEL on my own - Long story but battery(ies) completely drained (hazards left on for 4 hrs). Car required a jump, afterwards CEL came on.Still present a day and half later after 75 miles of driving multiple ignition starts and a gas fill.
Thanks
Thanks
Thread Starter
Junior Member
Joined: Dec 2015
Posts: 53
Likes: 11
From: Westchester County NY
2020 E350, 2019 GLC 300
MBWorld Fanatic!
Joined: Nov 2014
Posts: 5,394
Likes: 1,108
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In order to view and/or clear fault codes and reset the CEL you need an OBD2 scanner device. They come in all types with varying capabilities such as stand alone, WiFi and Bluetooth. They are not inexpensive.
Super Member
Joined: Nov 2013
Posts: 746
Likes: 178
From: NorCal
2015 ML350+2025 E350
Some codes are self clearing. When the "fault" that caused the CEL in the first place is corrected, the system resets the light after one of more "no-fault" cycles of the condition that turned the light on. Best example is loose (or forgotten) gas cap.. If the light stays on you need to scan (or have scanned) for trouble codes.
MBWorld Fanatic!
Joined: Feb 2014
Posts: 6,190
Likes: 1,550
From: MA
2008 E350 4Matic, 2011 E350 4matic
With a check engine light, you can either just go to an auto parts store and have the code read for free or you can just buy a cheap OBDII scanner and clear the code yourself. The BAFX bluetooth ELM327 is popular on Amazon, works with Android. I believe for iphone you need to find a wi-fi one. Or you can pick up an icarsoft MB system, those are about $150 on Amazon and will read MB specific codes that a basic OBDII scanner will not.
