Fuel level gauge and Ambient light issues (fixed)
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Joined: Jun 2018
Posts: 376
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From: WA
e63s
Fuel level gauge and Ambient light issues (fixed)
Hello all, just wanted to let you all know I had issues with fuel level gauge and ambient light recently.
After keeping the car for about 36 hours in the garage I decided to fill up the tank because it had only 3/8 of the tank.
I put the full tank and noticed level did not move at all, I was observing the whole day and saw sometimes level has been moving when I was driving up to a hill and after about 6h level gauge showed me 1/2 of the tank.
Later that day after dusk I've noticed ambient light did not work all around except driver door. I did a small search and found cars that have been made before Dec 2017 had Ambient light issue (my car is Feb 2018) and dealers have to do software update after that problem did not show up again. I tried to change ambient light settings and brightness but did not help.
I decided to do simple steps to fix it without visiting a dealer because I assume the system got some glitch and simply need "hard reset".
I found fuses that responsible for the fuel pump and ambient light in trunk's fuse box, removed them and ambient light started to work as normal right after I put the fuse back and started the car.
Fuel level did not start to work after that, I've removed fuse again, started the car, and saw that the fuel level has disappeared at all, I turned the car off, put the fuse back, started again and fuel level came back with correct level.
After that, I've asked a few different owners of w213 I know and some of them told me that they had an issue with fuel level gauge after that I decided to make this post and let you know in case if you will get the same issue with your w213.
After keeping the car for about 36 hours in the garage I decided to fill up the tank because it had only 3/8 of the tank.
I put the full tank and noticed level did not move at all, I was observing the whole day and saw sometimes level has been moving when I was driving up to a hill and after about 6h level gauge showed me 1/2 of the tank.
Later that day after dusk I've noticed ambient light did not work all around except driver door. I did a small search and found cars that have been made before Dec 2017 had Ambient light issue (my car is Feb 2018) and dealers have to do software update after that problem did not show up again. I tried to change ambient light settings and brightness but did not help.
I decided to do simple steps to fix it without visiting a dealer because I assume the system got some glitch and simply need "hard reset".
I found fuses that responsible for the fuel pump and ambient light in trunk's fuse box, removed them and ambient light started to work as normal right after I put the fuse back and started the car.
Fuel level did not start to work after that, I've removed fuse again, started the car, and saw that the fuel level has disappeared at all, I turned the car off, put the fuse back, started again and fuel level came back with correct level.
After that, I've asked a few different owners of w213 I know and some of them told me that they had an issue with fuel level gauge after that I decided to make this post and let you know in case if you will get the same issue with your w213.
Last edited by Mandarin; Sep 5, 2019 at 06:10 PM.
