M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Keyless Go not working

Old Feb 7, 2021 | 02:07 PM
  #1  
Thanosh Krish's Avatar
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2011 ML 350 BluTec Grand Edition
Keyless Go not working

Hi guys,

My 2011 ML 350 BluTec Keyless Go is not working. I can't enter the car without the clicking the button on the key, nor does the button work (I insert the key and turn now). I have replaced the key fob batteries, tried the second key, and have tried starting it in multiple places (incase radio interference was a problem). This has been a problem for the past three years, and I am deciding to act on it now.

Any help is much appreciated

I received this car from my father a couple of days ago and am really excited to work on it!

Thank you all,
TK

P.S. Any people near Toronto, Canada that know where to get better lug nuts, or have a spare LED driver's side tail light, please please reply to this forum, I will buy them.

P.P.S. Anyone who knows a good tune for this ML, please reply as well.


Not too shabby eh haha
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Old Feb 7, 2021 | 02:58 PM
  #2  
Thanosh Krish's Avatar
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2011 ML 350 BluTec Grand Edition
Originally Posted by Plutoe
get a proper scan to diagnose the keyless go.
Can I do that with a obd2 scanner?
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Old Feb 8, 2021 | 03:37 AM
  #3  
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2002 ML 320 & 2006 ML500
Originally Posted by Thanosh Krish
Can I do that with a obd2 scanner?
If it is just a cheap code reader, then the answer is no. Here is a suggestion of what you should have.
Amazon Amazon
Attached Files
File Type: pdf
DTC Keyless Go.pdf (60.2 KB, 331 views)
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Old Feb 9, 2021 | 12:14 PM
  #4  
Thanosh Krish's Avatar
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2011 ML 350 BluTec Grand Edition
My scanner didn't throw any faulty codes on the module
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Old Feb 10, 2021 | 02:34 AM
  #5  
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Originally Posted by Thanosh Krish
My scanner didn't throw any faulty codes on the module
There are many variants of Obd2 . How much did you pay for it?
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Old Feb 11, 2021 | 02:12 AM
  #6  
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2006 R500
My Keyless Go module died due to being flooded in the trunk. I would check that first.
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Old Feb 11, 2021 | 12:13 PM
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2011 ML 350 BluTec Grand Edition
I got it for 280 dollars CAD, but its retail is 350 I think.

It's called the Innova 3160RS.
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Old Feb 11, 2021 | 12:14 PM
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2011 ML 350 BluTec Grand Edition
Where in the trunk is it located? What does it look like?
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Old Feb 11, 2021 | 12:17 PM
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At the bottom of the spare tire well. Lift the hatch at the back and it's probably one of the black computer modules attached to the bottom.
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Old Feb 11, 2021 | 01:47 PM
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Originally Posted by Thanosh Krish
Where in the trunk is it located? What does it look like?

What are you looking for?
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Old Mar 1, 2021 | 10:06 PM
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I would take out the front SAM out and see for water damage. wash it with %90 alcohol with a soft brush and let it dry real good before put it back in.
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Old Mar 2, 2021 | 04:16 AM
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When you press the lock or unlock button, does the inspection window turn RED?
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Old Apr 2, 2026 | 05:29 AM
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W164 ML-Class 350 Bluetec 2011
Originally Posted by Thanosh Krish
Hi guys,

My 2011 ML 350 BluTec Keyless Go is not working. I can't enter the car without the clicking the button on the key, nor does the button work (I insert the key and turn now). I have replaced the key fob batteries, tried the second key, and have tried starting it in multiple places (incase radio interference was a problem). This has been a problem for the past three years, and I am deciding to act on it now.

Any help is much appreciated

I received this car from my father a couple of days ago and am really excited to work on it!

Thank you all,
TK

P.S. Any people near Toronto, Canada that know where to get better lug nuts, or have a spare LED driver's side tail light, please please reply to this forum, I will buy them.

P.P.S. Anyone who knows a good tune for this ML, please reply as well.


Not too shabby eh haha


Did you find any solution for this problem?

i have the same car and the keyless go is not working. There is no sign of key not detected or something like that. It just doesnt work.
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Old Apr 2, 2026 | 07:47 AM
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W221 S500
Originally Posted by Kejvi
Did you find any solution for this problem?

i have the same car and the keyless go is not working. There is no sign of key not detected or something like that. It just doesnt work.
Are you sure it has keyless go? Option code 889.
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Old Apr 2, 2026 | 09:12 AM
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W164 ML-Class 350 Bluetec 2011
Originally Posted by AL5461
Are you sure it has keyless go? Option code 889.

Yes. It has the buttons located at the door handles for the keyless entry.
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Old Apr 2, 2026 | 10:50 AM
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W221 S500
Originally Posted by Kejvi
Yes. It has the buttons located at the door handles for the keyless entry.
In that case scan it for codes and see what it's complaining about.
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Old Apr 7, 2026 | 08:24 PM
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Just FYI

if today you visit a dealer to order a replacement key, they will advise that keyless go versions are no longer available.

do not know how long this has been the case.

suppose might verify your key
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Old Apr 7, 2026 | 08:32 PM
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Dude I had a similar issue with my 2022 GLS, turned out the fob was dead and just needed a replacement. Make sure to check the battery and try resetting the fob before calling Mercedes or taking it to a dealership. If that doesn't work, reach out to me and I can walk you through the troubleshooting steps I took.
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