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Hello, I don't need any help, I just want to share my experience with my ML 320 CDI 2008 W164 VIN: WDC1641221A334122.
In short. Rear SAM was replaced (purchased "used SAM" from Prise & Jouer Mercedes-Benz W164 Rear Sam Programmed A1645409562 with support for reprogramming according to my VIN).
Here are the symptoms I noticed on my ML:
All fuses were OK.
According to the electrical diagrams (pe54.15-p-2103-97mad) and (pe54.15-p-2103-97raf) on bus 30, we found fuses F15, F27, F28, F58, F31, F36, F35, F46. These fuses are located on the same bus next to the ohmmeter.
First, I had an anomaly on the Mercedes diagram (pe54.15-p-2103-97mad) > Anomaly: Fuse 46 is on bus 15R, not on bus 15.
Details:
Indeed, the KR relay did not supply 12V to the 15R bus (relay PIN 30).
Applying 12V to this fuse cleared the problem, but I didn't have the cause of the problem and I had a battery that was slowly draining over 24 hours as the 15R bus is supposed to work with the engine contact only.
Returning to the diagram, PIN 85 of the KR relay is indeed a command coming from the SAM. This PIN (at the P5 PIN 1 socket of the rear fuse block) was still at 12VDC.
By grounding this PIN, the relay worked, the fault disappeared, but still with a loss of voltage after 24 hours, since there is 12VDC on the 15R.
I go back to the diagram and see that "P5 PIN 1" arrives to the rear SAM in "G PIN 13 socket". I disassembled, opened the rear SAM and found that at least one HS microdiode is connected to the G socket of the rear SAM on PIN 13. Not wanting to risk replacing this microdiode (the diode is multilayer and very small, the SAM works correctly with a temporary hack by putting a ground with a manual control, such as an intermediate switch to turn on the wipers in case of rain). Also, if the microdiode was HS, I assumed the other elements would be HS too. So I decided to change the rear SAM and now everything is fine.
Notes:
As you may know the rear SAM can float in water because we have an issue with the seal on the side of the taillights on this type of ML, as in my case, I also moved the rear SAM higher to prevent this from happening. I also changed the rear light gaskets.
Best regards.
In short. Rear SAM was replaced (purchased "used SAM" from Prise & Jouer Mercedes-Benz W164 Rear Sam Programmed A1645409562 with support for reprogramming according to my VIN).
Here are the symptoms I noticed on my ML:
- Front wipers are off
- SRS alarm on the car dashboard
- Front cigarette lighter + glove compartment light is out of order
All fuses were OK.
According to the electrical diagrams (pe54.15-p-2103-97mad) and (pe54.15-p-2103-97raf) on bus 30, we found fuses F15, F27, F28, F58, F31, F36, F35, F46. These fuses are located on the same bus next to the ohmmeter.
First, I had an anomaly on the Mercedes diagram (pe54.15-p-2103-97mad) > Anomaly: Fuse 46 is on bus 15R, not on bus 15.
Details:
Indeed, the KR relay did not supply 12V to the 15R bus (relay PIN 30).
Applying 12V to this fuse cleared the problem, but I didn't have the cause of the problem and I had a battery that was slowly draining over 24 hours as the 15R bus is supposed to work with the engine contact only.
Returning to the diagram, PIN 85 of the KR relay is indeed a command coming from the SAM. This PIN (at the P5 PIN 1 socket of the rear fuse block) was still at 12VDC.
By grounding this PIN, the relay worked, the fault disappeared, but still with a loss of voltage after 24 hours, since there is 12VDC on the 15R.
I go back to the diagram and see that "P5 PIN 1" arrives to the rear SAM in "G PIN 13 socket". I disassembled, opened the rear SAM and found that at least one HS microdiode is connected to the G socket of the rear SAM on PIN 13. Not wanting to risk replacing this microdiode (the diode is multilayer and very small, the SAM works correctly with a temporary hack by putting a ground with a manual control, such as an intermediate switch to turn on the wipers in case of rain). Also, if the microdiode was HS, I assumed the other elements would be HS too. So I decided to change the rear SAM and now everything is fine.
Notes:
As you may know the rear SAM can float in water because we have an issue with the seal on the side of the taillights on this type of ML, as in my case, I also moved the rear SAM higher to prevent this from happening. I also changed the rear light gaskets.
Best regards.
