AdBlue tank error on Mercedes E Klasse diesel

Ugh, that sounds familiar! I had almost the exact same problem with my BMW 3 series a few years back. Constant dashboard warnings about emissions control, the whole nine yards! It turned out to be a faulty AdBlue injector, messing with the diesel exhaust. Did you check the injector? It could be clogged or just plain broken. It's frustrating when fuel efficiency is impacted by these things. Why can't these systems just work?

Injector, huh? That's a good shout. I was so focused on the tank itself I didn't even think about that. How did you figure out it was the injector and not something else? Was it easy to diagnose?

Well, initially, I was just as lost as you are now! I spent ages researching online and even tried topping up the AdBlue multiple times – total waste of time and money. Eventually, I bit the bullet and took it to a workshop. They ran some diagnostics and pinpointed the injector pretty quickly. Honestly, unless you're super confident with car repairs, I'd suggest doing the same. It’s a pain, but probably quicker and safer than trying to fix it yourself!

Cheers for the advice! Took it to my local workshop, and you were spot on – faulty AdBlue injector. They replaced it, cleared the error codes, and now it's running like a dream. Cost me around 260€ in the end, but at least the annoying dashboard alert is gone. Thanks again for the help!