I have asked for advice here because there seems to be more knowledge collectively than the dealer or average mechanic has on this specific vehicle due to the DIesel component.

Funny you should mention the request for part #s and details. I did request that yesterday for this very reason and this was what I got back.

“The active tank and control module are $2556.17 installed. Labor for diagnosis will be 2hrs.”

Agreed. I need specifics and logic as to how they concluded this.