Based on your video and Jaybob's excellent rendition on the N3/9 architecture it looks like your new alternator is indeed in communication with N3/9 and under its control.

But since the check engine light and glow plug light on the dash are still on I'm guessing there still is some sort of issues with communications between N3/9 and the glow plug controller N14/2.

Since the error with the glow plug controller happened at the same time your new alternator was installed I'm still thinking there is some sort of incompatibility between the new alternator and the LIN bus that is causing issues with the communication to N14/2.

But from the images in your last post it appears to me that your "MBII" scan tool is having problems communicating with your car at this point in time. Both errors seem to be telling you the MBII scan tool can't initiate communications to the car. I have no idea what a 'knowledge base error' and a 'synchronization of the DTC " means - do you have any documentation or guidance with the MBII scan tool that info on 930E or 930C error codes?

I don't think those codes are MB-specific, I think they're associated with the MBII scan tool?

At any rate until you can get the MBII scan tool back into communicating with N3/9 or come up with another scan tool that can you're kind of unable to proceed.

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