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ML 320 CDI (W164) - Fuel Gauge does not work

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Old 11-22-2018, 12:29 PM
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Thumbs down ML 320 CDI (W164) - Fuel Gauge does not work
I have 2008 Mercedes ML 320 CDI (W 164) and suddenly Fuel gauge stop working (sitting at empty tank)

Does anybody have a clue what is the problem and how to fix it.

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Old 11-22-2018, 04:22 PM
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There are two fuel level sensors, one on each side of the fuel tank and are controlled by the rear SAM.

The codes must be read with a scanner to determine which one it is, codes 90DA, B, C & D.
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Old 11-22-2018, 05:47 PM
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I do have scanner but it does not see any code? Maybe it can be scanned by dealer?
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Old 11-23-2018, 07:58 AM
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Originally Posted by zenica92
I do have scanner but it does not see any code? Maybe it can be scanned by dealer?
If you only have a code reader, it is only good for reading ECM codes and nothing else.

You need a scanner that will read all of the 28 modules in your truck.

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Old 11-23-2018, 09:29 AM
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Originally Posted by Maj. Dundee
If you only have a code reader, it is only good for reading ECM codes and nothing else.

You need a scanner that will read all of the 28 modules in your truck.

https://www.amazon.com/Autel-MD802-M...autel+maxidiag
I do have AUTEL AL619
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Old 11-23-2018, 09:37 AM
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Originally Posted by zenica92
I do have AUTEL AL619
I took a quick look at the AL619 and it only appears to cover ECM, ABS and SRS.
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Old 11-23-2018, 09:46 AM
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So i should buy better one
till i buy it i will try to go to mechanic and test it
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Old 11-24-2018, 05:13 AM
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Originally Posted by zenica92
So i should buy better one
till i buy it i will try to go to mechanic and test it
Amazon Amazon
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Old 11-24-2018, 10:08 AM
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Originally Posted by Maj. Dundee
If you only have a code reader, it is only good for reading ECM codes and nothing else.

You need a scanner that will read all of the 28 modules in your truck.

https://www.amazon.com/Autel-MD802-M...autel+maxidiag
1. Bside this problem I do have another message I can read with my scanner = P0408.

I clean EGR valve and message is still there.

2. I also have 2003 S500 with SRS R12/3, does it really mean Clock spring is bad.


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Old 11-24-2018, 01:33 PM
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Please UPDATE YOUR PROFILE in USER CP on each of your vehicles , year, model and where you live.
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Old 11-28-2018, 09:06 PM
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I checked code at mechanic shop and it is 90DB
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Old 11-29-2018, 05:09 AM
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Originally Posted by zenica92
I checked code at mechanic shop and it is 90DB
The code says that the right rear (passenger) fuel level sensor, which is part of the fuel pump, is defective and must be replaced.
Attached Files
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R&I Fuel Filter #1.pdf (115.1 KB, 512 views)
File Type: pdf
R&I Fuel Filter #2.pdf (111.2 KB, 398 views)
File Type: pdf
R&I Fuel Filter #3pdf.pdf (196.1 KB, 445 views)
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Old 11-29-2018, 09:33 AM
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Originally Posted by Maj. Dundee
The code says that the right rear (passenger) fuel level sensor, which is part of the fuel pump, is defective and must be replaced.
It means I have to change fuel pump!

Another expensive fix on this car.

On this car I have so many problems and expensive fixes.


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Old 11-19-2019, 06:10 PM
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Originally Posted by zenica92
It means I have to change fuel pump!

Another expensive fix on this car.

On this car I have so many problems and expensive fixes.
hey i know this is an old post but i am having the same issue. How much did it cost you?
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Old 11-20-2019, 05:38 AM
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Originally Posted by Dinismb
hey i know this is an old post but i am having the same issue. How much did it cost you?

If you have the same codes, then you must replace the fuel pump.

If you don't, then the codes must be read.
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