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Should the connector be that loose on the post.
If that is not getting a good connection there could that cause the problem(s).
Bob
I can't remove my disconnect unless I disengage the red, plastic, sliding lock. I can spin it on the post w/o disengaging the lock, but I'd have to pull on it pretty hard (I'm a weakling compared to most people I know) to get it off the post. Yours is loose. You can't buy the connector. You have to buy the cable.
I think that a loose ground connection like that could cause problems, including disrupting expected voltage and amperage characteristics to electronically sensitive control modules, which is a fancy term for highly specific computer.
There are between 20 and 24 computers in 2007-2009 US/Canadian Sprinters.
Could there be permanent damage, like a home computer that doesn't have power protection, and suffers brown outs and power spikes? I don't know.
I've always assumed that computers in cars, airplanes, the space shuttle are more "hardened" than your run of the mill Mac or PC.
You've had it scanned for DTCs; I think a system self check failure would present on the scan tool, but I've never seen a dead control module in person or on a scan tool.
If I were you, I'd seriously consider calling the nearest MB Sprinter dealership that will look at the van, go there and pay whatever it takes to get the electronics confirmed "good." That's me. I get that not everyone would go that way.
-Jon