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heinz
Veteran
Date registered: Dec 2006
Location: Tuscaloosa, Alabama
Vehicle(s): G500, MY 2000
Posts: 176
| Left rear module
Right now my G500 drives only in limp mode. First my mechanic said I need a new speed sensor. I replaced the speed sensor, but that wasn't the fault. Now the fault code says P0500-25 "Vehicle speed signal Rear left wheel speed". Now my mechanic said it's to complicated for him to fix this problem. Has anybody experience with this problem or any idea what to do and what it costs to replace the left rear module? Thanks in advance.  |
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| RE: Left rear module
It sounds like it's related to the ABS ring or sensor on that left rear wheel. |
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WEBIII
Extreme Veteran
Date registered: Oct 2010
Location: Inlet Beach, FL
Vehicle(s): 461.318, 463.241
Posts: 315
| Re: Left rear module
Heinz, is your truck at the MB dealership in Birmingham? There are some independent shops in Birmingham where you might have better luck. I can get you the contact info if needed.
Winston |
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thebigblue
Date registered: Jan 2012
Location:
Vehicle(s):
| Re: Left rear module
I´m not an expert, but a defective ABS sensor should not force the truck into limp-mode in my opinion, just disable the ABS and ESP.... But, yes replacing the sensor would be a first step being fairly inexpensive. Extensive vibrations on long off-road travels have occasionally forced mine to disable the ESP/ABS, but it has never went into limp for that reason.
Edited by thebigblue 9/16/2015 10:03 AM
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heinz
Veteran
Date registered: Dec 2006
Location: Tuscaloosa, Alabama
Vehicle(s): G500, MY 2000
Posts: 176
| Re: Left rear module
WEBIII - 9/16/2015 7:45 AM
Heinz, is your truck at the MB dealership in Birmingham? There are some independent shops in Birmingham where you might have better luck. I can get you the contact info if needed.
Winston
My G is in my garage. I could not yet find a good G-specialist for this problem in Tuscaloosa. If you know somebody in Birmingham please let me know. |
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heinz
Veteran
Date registered: Dec 2006
Location: Tuscaloosa, Alabama
Vehicle(s): G500, MY 2000
Posts: 176
| Re: Left rear module
My G500 is a pre-MBUSA MY 2000. They told me it does not yet have ESP. ESP came with MY 2002. Is that right? |
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| Re: Left rear module
heinz - 9/16/2015 3:31 PM
My G500 is a pre-MBUSA MY 2000. They told me it does not yet have ESP. ESP came with MY 2002. Is that right?
Ganz richtig, but it does have ABS. |
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| Re: Left rear module
thebigblue - 9/16/2015 10:01 AM
I´m not an expert, but a defective ABS sensor should not force the truck into limp-mode in my opinion, just disable the ABS and ESP.... But, yes replacing the sensor would be a first step being fairly inexpensive.
Not really inexpensive.
Left Rear ABS Sensor: A.463.540.13.17 MSRP US$346.00 Discounted US$259.50
Locking Clip: A.000.992.21.29 MSRP US$2.90 Discounted US$2.17 |
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| Here Are The WIS Procedures
From the WIS.
Removing the sensor is not a big deal, but replacing the ABS ring IS a big deal.
Attachments
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 Remove_install rear axle speed sensor.pdf (53KB - 11 downloads)
Remove_install rear axle shaft.pdf (50KB - 10 downloads)
Disassemble_assemble rear axle shaft.pdf (62KB - 9 downloads)
Pressing tapered roller bearing off and on rear axle shaft.pdf (44KB - 10 downloads)
Remove_install ABS measuring ring.pdf (45KB - 9 downloads)
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WEBIII
Extreme Veteran
Date registered: Oct 2010
Location: Inlet Beach, FL
Vehicle(s): 461.318, 463.241
Posts: 315
| Re: Left rear module
Heinz,
Central Auto Care is very near my house. They only do Mercedes and I know they have had experience with pre-MBUSA G500s. Phone: (205) 870-3146
World Class Auto Repair is well known for servicing high-end Euro cars. Philip is the owner and has experience with w460 and w463 trucks. Phone: (205) 208-1343
Duffy's Garage has experience with G500s and does a lot of 4x4 work mostly on Land Rovers. Phone: 205.715.2100
I'm happy to help any way I can so just let me know.
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Aircruiser
Extreme Veteran
Date registered: Aug 2011
Location: Atlanta GA
Vehicle(s): 2000 G500, 1986 300GD, 2017 Porsche Cayenne Hybrid
Posts: 364
| Re: Left rear module
Heinz,
Has anything changed recently with your tires? Running a slightly different size tire could cause the rpm difference required to generate this fault. Brake work preformed? Does the speedometer work? ABS light? Hoping for simple solutions.
Matt
Edited by Aircruiser 9/16/2015 10:26 PM
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heinz
Veteran
Date registered: Dec 2006
Location: Tuscaloosa, Alabama
Vehicle(s): G500, MY 2000
Posts: 176
| Re: Left rear module
Thank you guys for all your advice and support. I'm still in Germany and traveling in Europe. I will be back in Tuscaloosa October 21. Then I will try to find somebody to fix the problem. I bought here a new left rear ABS sensor and locking clip for 201 Euro. The official German name for this part (A.463.540.13.17) is Drehzahlgeber. I will keep you informed. |
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03-Gwagen
Elite Veteran
Date registered: Apr 2006
Location: Western Pennsylvania
Vehicle(s): CLK63 Black Series, 2018 G63, 2016 GLE300d
Posts: 888
| RE: Left rear module
My 03 went into limp home once.
It was caused my trans fluid wicking into the electrical harness.
Replace plug on harness. Cleared issue. |
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heinz
Veteran
Date registered: Dec 2006
Location: Tuscaloosa, Alabama
Vehicle(s): G500, MY 2000
Posts: 176
| Re: Left rear module
My G was now for 3 weeks at another workshop in Northport, AL, named "Robert Mercedes". Somebody recommended him as Mercedes specialist. Robert changed the speed sensor and ABS sensor without success. G was still in limp mode. Then he said there is not enough voltage at the ignition switch. I had to buy a new one. And when he told me he had also to change the whole ESP control module for $2,400 and to install a new instrument cluster for $1,200 then I got really suspicious, because my G has no ESP.
I called some G-experts in Germany and they told me it could be just the K40 relay. They said if the K40 is defect then the electronic fault diagnosis could go crazy and shows false fault codes. And that is exactly what happened with my G. Today I changed the K40 relay for $ 150 and at once my G drives like usual again. The whole cost estimate from Robert was $ 5,000 but the problem could have been fixed for $ 150. Crazy!
Has anybody made similar experiences with his G? |
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AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| Re: Left rear module
Yeah, the K40 is the root of evil in pre-MBUSA Gs. It is pretty easy to change out. I have to admin I wouldn't have fingered the K40 for this fault pattern, but all ABS power does go through it.
If you are handy with a soldering iron it can be repaired pretty easily too. Anyone with a 1996+ pre-MBUSA G that still has the original K40 should replace it. It it s ticking time bomb. The new one is not a better design, but the clock is restarted at zero.
Edited by AlanMcR 11/14/2015 11:15 PM
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| Re: Left rear module
Heinz, Glad you found the problem and that it was an inexpensive fix. Sounds like Robert Mercedes is a place to stay far, far away from. Thanks for sharing your solution! |
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heinz
Veteran
Date registered: Dec 2006
Location: Tuscaloosa, Alabama
Vehicle(s): G500, MY 2000
Posts: 176
| Re: Left rear module
AlanMcR - 11/14/2015 10:14 PM
Yeah, the K40 is the root of evil in pre-MBUSA Gs. It is pretty easy to change out. I have to admin I wouldn't have fingered the K40 for this fault pattern, but all ABS power does go through it.
If you are handy with a soldering iron it can be repaired pretty easily too. Anyone with a 1996+ pre-MBUSA G that still has the original K40 should replace it. It it s ticking time bomb. The new one is not a better design, but the clock is restarted at zero.
The first time I changed the K40 in my MY2000 G500 in 2007 and now again in 2015. That means the average life expectancy is 7 to 8 years. |
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AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| Re: Left rear module
K40? What K40?
 (K40Parts.jpg)
 (K40-3-Replacement.jpg)
Attachments
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K40Parts.jpg (58KB - 2 downloads)
K40-3-Replacement.jpg (80KB - 1 downloads)
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Otiswesty
Administrator
Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3006
| Re: Left rear module
Nice one Alan |
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heinz
Veteran
Date registered: Dec 2006
Location: Tuscaloosa, Alabama
Vehicle(s): G500, MY 2000
Posts: 176
| Re: Left rear module
AlanMcR - 11/15/2015 8:00 PM
K40? What K40?
This K40
 (IMG_20151114_132754497 (Small).jpg)
Attachments
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IMG_20151114_132754497 (Small).jpg (95KB - 1 downloads)
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