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post #11 of 16 Old 01-14-2018, 07:19 AM Thread Starter
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It is showing all the signs of a faulty SAM.
That was my thought as well. He said that the code was signal lost to the sam which led him to the prefuse to check those and apparently there is a fuse out in there. I would MUCH rather it be the prefuse than the sam but it is what it is I guess

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post #12 of 16 Old 01-14-2018, 07:27 AM
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That was my thought as well. He said that the code was signal lost to the sam which led him to the prefuse to check those and apparently there is a fuse out in there. I would MUCH rather it be the prefuse than the sam but it is what it is I guess

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With a surge strong enough to blow a prefuse, then for sure it will damage a SAM before the prefuse blows, the SAM units are very delicate units and act as a nerve center to take in and send out signals, in this case all the signals are going haywire which points directly at a SAM unit.

These are quite expensive units so the Tech needs to be sure it is at fault and hence his doubt.

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post #13 of 16 Old 01-14-2018, 08:29 AM Thread Starter
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With a surge strong enough to blow a prefuse, then for sure it will damage a SAM before the prefuse blows, the SAM units are very delicate units and act as a nerve center to take in and send out signals, in this case all the signals are going haywire which points directly at a SAM unit.

These are quite expensive units so the Tech needs to be sure it is at fault and hence his doubt.
Thats what he said too. I can get a complete new SAM from Mercedes here for $510USD. I dont understand the german cars at all. I would think that if the unit were bad then fuses would show no pwr to them but that's not the case with this thing. All the fuses show up as fine when tested making one think all is ok but apparently not.

Said he did a continuity check in the prefuse box to find something out. Just ready to be done with this car.

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post #14 of 16 Old 01-14-2018, 08:41 AM
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Thats what he said too. I can get a complete new SAM from Mercedes here for $510USD. I dont understand the german cars at all. I would think that if the unit were bad then fuses would show no pwr to them but that's not the case with this thing. All the fuses show up as fine when tested making one think all is ok but apparently not.

Said he did a continuity check in the prefuse box to find something out. Just ready to be done with this car.

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Did water enter the car or its electronics at any time in the past?

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post #15 of 16 Old 01-15-2018, 11:52 PM Thread Starter
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Did water enter the car or its electronics at any time in the past?
Not to my knowledge. It was a front end impact.

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post #16 of 16 Old 01-24-2018, 07:45 PM Thread Starter
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Ok checked with multimeter and there is power in the line but light will not come on no low no high the halo was working and the turn signal but that stopped working today as well. The left halo and turn single does not work but the low and high beams do?? The push button in my trunk to close the lid was working but that stopped and now my rear window shade wont move either.

I ordered a front SAM today will arrive tomorrow and I hope this fixes the issues with my lights.

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