P13E7FD AdBlue level is insufficient - Unable to assess fluid level

[Carishme]

My 2018 E Class Cabriolet (46,000 miles) is equipped with a 10-liter AdBlue tank, and I have consistently replenished it with 5 litres of AdBlue, including an anti-crystal component, immediately upon the activation of the warning sign.

This week, it determined that it could no longer interpret the level. P13E7FD error code reappears immediately upon clearance.

I lowered the tank, discharged 6 litres of AdBlue, then inserted a borescope to inspect for any apparent issues. I saw crimson specks scattered across the area and on the white mesh at the tank's base, however there was no apparent issue. I anticipated crystals or a similar substance. I purged it with AdBlue, replenished it with 4 litres of fresh AdBlue, and reconnected it.

No satisfaction.

Frustratingly, once clearing the code, the dashboard display correctly indicates 4L of fluid for a brief while before reverting to 'Cannot measure fluid level.'

A new tank, with a pump that is unnecessary due to the absence of any faults, costs £1300.
A comparable used tank of similar age is priced at £250 on eBay; hence, I will pursue that option first.

I wanted to share this in case anyone believe they can successfully 'clean' the tank to resolve a level sensor malfunction.

[depofly]

I visited three years ago for a remap and AdBlue deletion, and I have seen no issues since. Approximately £1000 was spent on Nox sensors prior to the "cannot measure level" alert. I should have remapped initially to save time and resources.

[Lemmand]

Does it successfully complete a MOT test?

[depofly]

Successfully completed the remaining three without any issues.

[AmericaMonster]

Disregarding the merits of the AdBlue Delete, you might address the existing issue with the AdBlue level sensor by substituting the AdBlue tank with a pre-owned unit from eBay. However, AdBlue complications are typically recurrent and expensive to rectify; I recommend repairing the vehicle rather than trading it in prior to the emergence of another AdBlue problem. It is unfortunate, since these vehicles are otherwise exceptional.

[tr4s]

Not included in the assessment...at this moment! It seems that it may occur shortly.
Removing or modifying factory-fitted emissions equipment from a vehicle is prohibited, resulting in a £1000 fine and potentially voiding insurance coverage. However, it is worth noting that there are no known instances of anyone being convicted or having insurance claims denied for this offence.
Having perused several accounts of the ADblue debacle on this platform, I fully get the allure of eliminating it from the system. The whole system is inadequate for its intended function. On the Jaguar XF forum, I have not seen any alarming accounts about ADblue, indicating that it is feasible; nevertheless, it seems that Mercedes has not achieved this success.

[Carishme]

A new tank from eBay has unexpectedly resolved the problem.

We will determine the duration, however.

[FreexPatty]

Where may I locate you? I urgently want your assistance. Thank you in advance!

[bellox]

It seems that Jaguars would not need any AdBlue, since they are often transported on breakdown trucks. 😆