Help! About Online SCN Coding
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223.168 & 213.012 & 906.633 & 214.005
You can certainly replace the relay but I cannot see how it could be from a bad relay if it always stays on when it should not and still always turns off after 120 minutes. In addition if you state the power plug switches off immediately but the fridge does not, I cannot see how a bad relay could do that (can you confirm the independent life of the fridge power source and the rear seat power plug?).
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Junior Member
Joined: Sep 2009
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From: California
2009 GL550 650/201
You can certainly replace the relay but I cannot see how it could be from a bad relay if it always stays on when it should not and still always turns off after 120 minutes. In addition if you state the power plug switches off immediately but the fridge does not, I cannot see how a bad relay could do that (can you confirm the independent life of the fridge power source and the rear seat power plug?).
I asked a tech guy to did that in the dealership which he's working for, actually i did not saw the whole process,you should know that i can't walk in the repair-shop.
Do you think if i connected the wiring harness to a wrong position or wrong relay?
MBWorld Fanatic!
Joined: Dec 2006
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From: Europe
223.168 & 213.012 & 906.633 & 214.005
Yes, i can confirm the power outlet was switched off immediately and the fridge was still working when i turned off the ignition.
I asked a tech guy to did that in the dealership which he's working for, actually i did not saw the whole process,you should know that i can't walk in the repair-shop.
Do you think if i connected the wiring harness to a wrong position or wrong relay?
I asked a tech guy to did that in the dealership which he's working for, actually i did not saw the whole process,you should know that i can't walk in the repair-shop.
Do you think if i connected the wiring harness to a wrong position or wrong relay?
Would you be able to take a good lose-up photo from the rear fuse-box? It does sound like the fuse for the fridge is misplaced but then again like you mentioned earlier, the fuse holder is mechanically coded and one should not be able to misplace it, at least not possible to confuse near-by fuse positions.
Thread Starter
Junior Member
Joined: Sep 2009
Posts: 43
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From: California
2009 GL550 650/201
Well, I would not walk in the repair-shop, I would perform the measurements myself. Always better if you do not have to trust on what others say.
Would you be able to take a good lose-up photo from the rear fuse-box? It does sound like the fuse for the fridge is misplaced but then again like you mentioned earlier, the fuse holder is mechanically coded and one should not be able to misplace it, at least not possible to confuse near-by fuse positions.
Would you be able to take a good lose-up photo from the rear fuse-box? It does sound like the fuse for the fridge is misplaced but then again like you mentioned earlier, the fuse holder is mechanically coded and one should not be able to misplace it, at least not possible to confuse near-by fuse positions.
I am thinking about another possibility that the tech guy really wired the wiring harness to #139fuse in rear SAM, but for some reason,#139fuse did not controlled by O-relay, do you think that's possible ?
Last edited by a3po911; Jul 26, 2010 at 12:42 AM.
MBWorld Fanatic!
Joined: Dec 2006
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From: Europe
223.168 & 213.012 & 906.633 & 214.005
I guess anything is possible but then someone should have manufactured a wiring harness with swapped connections. They cannot mix wires at the factory by accident, connectors only fit in the correct way. If the harness was faulty, there would be some other part that would work incorrectly (may not have been installed to your car though).
Thread Starter
Junior Member
Joined: Sep 2009
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From: California
2009 GL550 650/201
Correct, this is what the wiring diagram states.
I guess anything is possible but then someone should have manufactured a wiring harness with swapped connections. They cannot mix wires at the factory by accident, connectors only fit in the correct way. If the harness was faulty, there would be some other part that would work incorrectly (may not have been installed to your car though).
I guess anything is possible but then someone should have manufactured a wiring harness with swapped connections. They cannot mix wires at the factory by accident, connectors only fit in the correct way. If the harness was faulty, there would be some other part that would work incorrectly (may not have been installed to your car though).
How can i find out if the fuse139 was connected to the O-relay? is this a fixed wiring can not be changed ? i mean from fuse139 to O-relay.
Thread Starter
Junior Member
Joined: Sep 2009
Posts: 43
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From: California
2009 GL550 650/201
Correct, this is what the wiring diagram states.
I guess anything is possible but then someone should have manufactured a wiring harness with swapped connections. They cannot mix wires at the factory by accident, connectors only fit in the correct way. If the harness was faulty, there would be some other part that would work incorrectly (may not have been installed to your car though).
I guess anything is possible but then someone should have manufactured a wiring harness with swapped connections. They cannot mix wires at the factory by accident, connectors only fit in the correct way. If the harness was faulty, there would be some other part that would work incorrectly (may not have been installed to your car though).
MBWorld Fanatic!
Joined: Dec 2006
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From: Europe
223.168 & 213.012 & 906.633 & 214.005
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MBWorld Fanatic!
Joined: Dec 2006
Posts: 6,499
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From: Europe
223.168 & 213.012 & 906.633 & 214.005
I don't think this would be possible at all in practise. The circuit board defines these connections and I would not start changing that.
