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

Electrical gremlins

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Old Dec 24, 2017 | 10:32 AM
  #1  
Speedy55's Avatar
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2004 E55 2008 ML63
Electrical gremlins

Hi Guys,
The wife’s 2007 ML63 for the second time now has mysteriously spawned the same problem now.
1. Turn signals don’t work
2. Brake lamps don’t work
3. Push to start does not work
4. Dash board does not work.
Last time this happened it went away on its own after sitting in the garage overnight.
Anyone had this happen to them before?
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Old Dec 24, 2017 | 02:14 PM
  #2  
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2002 ML 320 & 2006 ML500
Are you saying the complete dash does not function?
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Old Dec 24, 2017 | 02:36 PM
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Check fuse #11 in the cockpit fuse box and fuse #55 in the cargo area fuse box.
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Old Dec 25, 2017 | 08:13 PM
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2004 E55 2008 ML63
Correction,
Only the fuel gauge does not work. It reads 0.
Other than this the turn signals do not function, neither does the hazard button.
The push to start is disabled
The interior lighting seems to be affected as well.
From the research I've been doing all signs point to rear SAM module. Actually it was soaked in water, it appears there is some sort of leak in the vicinity. Ive taken it apart, cleaned it and dried it but no dice. One of the legs on the chips seems to be rotted off and it no longer functions.
Im going to order one tomorrow from the local dealership. Hopefully this resolves this issue.
Thanks for the help
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Old Dec 25, 2017 | 09:32 PM
  #5  
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ML420 W164 (2009)
Fix the leak or it'll be an expensive repeat exercise!

Common culprits are the rear light seals.

Good luck!
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Old Dec 26, 2017 | 05:10 AM
  #6  
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2014 Smart ForTwo Passion Cabrio
Originally Posted by Speedy55
Correction,
Only the fuel gauge does not work. It reads 0.
Other than this the turn signals do not function, neither does the hazard button.
The push to start is disabled
The interior lighting seems to be affected as well.
From the research I've been doing all signs point to rear SAM module. Actually it was soaked in water, it appears there is some sort of leak in the vicinity. Ive taken it apart, cleaned it and dried it but no dice. One of the legs on the chips seems to be rotted off and it no longer functions.
Im going to order one tomorrow from the local dealership. Hopefully this resolves this issue.
Thanks for the help
What Ted said. If your wife tries to shoot you but she's out of ammo you don't go buy more ammo.
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Old Dec 26, 2017 | 05:24 AM
  #7  
Maj. Dundee's Avatar
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2002 ML 320 & 2006 ML500
Originally Posted by Speedy55
Correction,
Only the fuel gauge does not work. It reads 0.
Other than this the turn signals do not function, neither does the hazard button.
The push to start is disabled
The interior lighting seems to be affected as well.
From the research I've been doing all signs point to rear SAM module. Actually it was soaked in water, it appears there is some sort of leak in the vicinity. Ive taken it apart, cleaned it and dried it but no dice. One of the legs on the chips seems to be rotted off and it no longer functions.
Im going to order one tomorrow from the local dealership. Hopefully this resolves this issue.
Thanks for the help
Before you do anything replace both tail lamp seals. Make sure the adhesive side is affixed to the body, and not to the tail lamp.

If you buy a new one, it will not fully function. It must be programmed.

'You would be better off if you found a used one with the same exact part number, which is already programmed.

Last edited by Maj. Dundee; Dec 26, 2017 at 06:20 AM.
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Old Dec 26, 2017 | 09:29 AM
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From: Toronto, Canada
2004 E55 2008 ML63
I started my search for a new one. However I cannot find one with the matching part numbers, there is 3 sets of part number on the SAM. Which one should I be looking at?
ZB: A 164 540 96 62
HW: A 164 545 13 16
SW: A 164 442 27 00
Also if i just find any SAM that came off the same type of car as my wife's do the part numbers need to match if the connectors are the same and if I'm going to have it reprogrammed anyways?
I've found ones in local recycling yards that are a great value but have differentiating part numbers.
Thanks for your help!
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Old Dec 26, 2017 | 12:43 PM
  #9  
Maj. Dundee's Avatar
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What is your full vin #?
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Old Dec 26, 2017 | 12:56 PM
  #10  
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The ZB number would be the part number but all of these SAM's have been replaced.
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Old Dec 30, 2017 | 03:10 PM
  #11  
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2004 E55 2008 ML63
Problem fixed!
Replaced rear SAM, reprogrammed and we are back in buisness.
I removed the rear taillights and sealed around the perimeter with Butyl sealant. Although the tech that did the work says its not the rear tail lamp rather it is the rear air vent in the quarter panel that leaks water into the body. Apparently they the dealer has an updated part for this due to the water intrusion. I will research this later. For now I covered it with some plastic in hopes of diverting any water from the vent. Will monitor situation after car wash.
Thanks for all the help guys, I would have had to pay someone to diagnose this for me otherwise.
Cheers!
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Old Dec 30, 2017 | 09:10 PM
  #12  
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When you removed the tail lamps, was the seal/gasket affixed to the tail lamp or the body of the truck?
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Old Dec 31, 2017 | 02:39 AM
  #13  
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ML420 W164 (2009)
Fill the cavity (and the one under the spare wheel, where the tailgate pump and transmission control unit live) with those sachets of silicon gel that absorb moisture.

Anything that I buy, that has those, they get saved to chuck in there! I also bought a bagful, cheaply, from Amazon.

Oh, the cavity under the passenger (drivers in my case) front seat where the batteries and front SAM module too.

Glad you got it fixed and good luck!
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Old Dec 31, 2017 | 02:29 PM
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2004 E55 2008 ML63
Originally Posted by Maj. Dundee
When you removed the tail lamps, was the seal/gasket affixed to the tail lamp or the body of the truck?
The seal gasket was affixed to the back of the lamp. However I examined the seal between that and the body and there was no sign of water coming in.
However I applied butyl sealant to the back of the gasket and pressed it onto the body anyways.
I think the culprit is that vent between the body and the bumper under the rear quarter panel.
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Old Jan 1, 2018 | 05:06 AM
  #15  
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Originally Posted by Speedy55
The seal gasket was affixed to the back of the lamp. However I examined the seal between that and the body and there was no sign of water coming in.
However I applied butyl sealant to the back of the gasket and pressed it onto the body anyways.
I think the culprit is that vent between the body and the bumper under the rear quarter panel.
You are being taken for a ride by the dealer. The problem has always been with the seals for MLs 2006-2009 and every other model that used the same seal. The original left and right seals were marked wrong at the factory.

So when the morons at the assembly plant were installing the lamps, the adhesive was on the wrong side. So instead of bringing it to management's attention, they simply placed the seal on the lamp instead on the body. The only thing they had to do was use the left seals on the right side and vice versa.

It's you vehicle and you can do what you want, but you should buy new seals.
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