The VW Passat Diesel we owned had a recall to replace the adblue heater and
pump unit - they did it under warranty so I have no idea what the cost was,
but I suspect it was several hundred dollars. Call your stealer ---

On Thu, Jan 20, 2022 at 2:08 PM mitch--- via Mercedes <[email protected]>
wrote:

> Those are SCR (Selective Catalytic Reduction) codes, specifically for
> the pee tank.
>
> I don't know about MBZ, but 2014-2015 Chevy Cruze had a lot of tank
> heater warranty claims, and urea quality poor codes that were from a bad
> sensor in the tank and didn't go away when you drained the urea and
> filled with fresh.
>
> A bad tank heater wouldn't be a great thing in January, that stuff
> freezes like water.
>
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-- 
OK Don

"Whenever you find yourself on the side of the majority, it is time to
pause and reflect." Mark Twain

“Basic research is what I’m doing when I don’t know what I am doing.”  Wernher
Von Braun
2013 F150, 18 mpg
2017 Subaru Legacy, 30 mpg
1957 C182A, 12 mpg - but at 150 mph!
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