You can also find the controller to see if it's connected or not.I'd have thought so too, or for it to say level not readable. But I did some quick research and it seems like there are some deletes that mask their presence by pretending it's still full at some plausible level.
We shall see after some experimentation
If you have the equipment then the pump etc. can be reset, but I believe the tank needs to be full to do this. According to my mechanic anyway.
Any chance of a photo of this adblue injector? Never seen one and not exactly knowing where to look or indeed what it even looks like?
Do you think the anti crystal foams because thats what it does when it meets crystals ?Saga update. I am now convinced the car has had an adblue delete. I checked again with the endoscope before and after pouring in just a couple of litres of adblue and there was a marked difference in how it looked. I think the tank was nothing but droplets before - bone dry. The reason I didn't realise the camera was scraping the bottom of the tank was because it was just droplets, so I thought it was a tank wall. After pouring in a bit, I could clearly see the liquid level.
I only did a little bit because the anti crystal stuff makes it really foamy and even with only a little bit added it bubbled out of the filler neck and spilled. So I'll just do a bit at a time and test drive it at some point. Anyways I think that's this mystery solved lol. We'll see what happens after I drive it and add more in.
For those who find this in the future and want to drain and refill your tank on a non-adblue-gutted C-Class here are some tips:
You need a syphon, I got a cheap bulb pump kind off of eBay:
View attachment 152142
The hose will probably be too stiff so go back onto ebay and get yourself a 6mm-8mm flexible PVC hose and some plastic pipe reducers to connect the thinner hose to your syphon.
Thread that through your filler neck. There are no obstructions, valves or anything in the filler neck. There is a 90 degree bend and the filler neck walls are quite rough and have some notches and such the pipe can catch on. If it gets stuck just keep twiddling it and trying to bend it until it goes past the 90 degree bend. After that it's a straight shot into the tank, you'll hit the pump thing and then the hose will slide past that to the bottom of the tank where it'll stop. Syphon as much out as you can.
I put the anti-crystal stuff in the adblue before adding it into the tank to mix it - don't know if that's a good idea but this stuff really does froth a lot, it's like detergent. Keep cloths/paper towels nearby - don't get this nasty stuff on your paintwork. My adblue container was leaky as hell with the supplied nozzle thing.
Thank you all for joining me on my adblue saga of discovery
Hmm I don't think so, I get the feeling the anti-crystal is just some kind of simple solvent and detergent mix. It smelled strongly of solvent and had a surfactants warning on the label. Which I guess would do the trick, surfactants loosen crystal deposits to be dissolved by the solvent? (I have no idea what I'm talking about btw)
It foams even in new ad blue.
Me neither buddy , but I’ve ordered a hand pump , looks like every chap should have one !
The mention of a tiny tank sounds like cross border smugglingYou guys there's more mystery. I wanted to put 5-10l of Adblue in there just in case/don't arouse suspicion when the dealer tries to drain the tank. It took about 2-3l and then overflowed... Like it was properly brimmed at the filler neck, I double checked. I even had to drain some back out cos it was too full for comfort.
At this point I have no idea what the hell has been done to this car lol. I'm super sure it was completely empty when I put the endoscope down there and the adblue range didn't budge at all from being brimmed. Still 6700 miles "full" so I'm still going with adblue deleted but why go through the trouble of fitting some tiny tank to it.
I'm so confused
You guys there's more mystery. I wanted to put 5-10l of Adblue in there just in case/don't arouse suspicion when the dealer tries to drain the tank. It took about 2-3l and then overflowed... Like it was properly brimmed at the filler neck, I double checked. I even had to drain some back out cos it was too full for comfort.
At this point I have no idea what the hell has been done to this car lol. I'm super sure it was completely empty when I put the endoscope down there and the adblue range didn't budge at all from being brimmed. Still 6700 miles "full" so I'm still going with adblue deleted but why go through the trouble of fitting some tiny tank to it.
I'm so confused
Same with mine, it used so little adblue it made me wonder what was the point of all these expensive systems fitted to the car when it used about a thimble full a week.When I filled my GLC it went Upto 8200 miles range . It seems to count down in 100 mile increments . I also thought mine was deleted but turned out it's just my icarsoft reader for the GLC is pure *ank.
My count is in the 7000's now after 4 months . I just forget about the ad blue now and concentrate on the 620 nm of torque and £1.47 a litre , spewing out of my pocket
lol fair jab. But as I said, just in case I'm wrong/don't arouse suspicion. The dealer should drain and refill every 2 years if a certain mileage hasn't been done. I know nothing is likely to come of it but I'd rather they didn't find a bone dry tank with a gauge saying "full"
No harm in there being some adblue in the tank.
Possible but it doesn't explain the weirdly small seemingly empty tank. If it was dry then the NOx would rise and it would give an adblue fault from the NOx sensors. So part of filling it up was also to experiment to see if the level would change, which it hasn't and I've driven nearly 100 miles today to give it a chance to read the new level.
Oh I agree, it started off as a question "what should I do?". I got the very sensible answer of syphon it out and add the anti-crystal - this was always the right course of action and what I'd recommend anyone with 1+ year old adblue in the tank do.
