AdBlue range concern

[QuirkEinstein]

May I request your guidance regarding the Ablue range?
One week post its second service, my 2023 C220d displayed a warning indicating a remaining AdBlue range of 450 miles.

My initial thought was that the Mercedes-Benz main dealer had not replenished the standard 10 litres, despite the notation on the documentation.
The dealer's response indicated that they had replenished it, suggesting a potential sensor issue, specifically referencing the NOx sensor.
The vehicle was scheduled for a follow-up appointment; however, due to an impending long journey, I deemed it wise to add extra maintenance myself.
The range has promptly expanded by 1000 kilometres.
My inquiry is if, if the vehicle experienced a NOx sensor malfunction, it would not display a fault message instead of a range warning. I believe the Dealer is attempting to deceive me - what are your opinions?
Warmest Regards

[Alex1978]

Is it feasible to submerge the tank?

[developer]

I would perform a complete recharge and subsequently assess the range. I advise utilising an Adblue pump at a service station instead of a bottle, which may result in spillage. The pumps include an automated shutoff mechanism.

[QuirkEinstein]

I am reluctant to confess my ignorance. Can anyone provide guidance?

[QuirkEinstein]

Thank you for the advice.

[Alex1978]

I do not either, to be honest. It is conceivable that it may be possible.

[SkippyTom]

The dashboard's fill level indicator is occasionally unreliable and requires rebooting with a diagnostic equipment.

[SkippyTom]

🙂