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Diesel Brethren:

DEF is a part of our modern day diesel life. However refilling our trunk-mounted tank is somewhat awkward. When spilled, DEF dries to a nasty white crystalline compound. Get it on your hands or paint and you'll be sorry that you did.

So here is the Tomko Method on how to do it best...

Go to your friendly neighbourhood Mercedes-Benz parts counter or online seller and request the following part.

View attachment 55689

It is called a filling hose, p/n 00 583 22 04, and I bought mine for $13.

View attachment 55697


This hose is equipped with a one way Kruse valve and connector. It attaches directly to the DEF spout beneath the carpet in our trunks. The other end of the hose connects to a 10 Litre Mercedes-Benz DEF container. I bought mine for $8, p/n 004 989 04 20 12.

View attachment 55705
View attachment 55713

Once attached this allows for a spill-proof transfer of fresh DEF into the car's DEF tank. It is fast, easy and above all clean. My car hit 7,300 miles today and I used this method to refill its DEF. It took nine litres.

This same filling hose can be attached to another source of DEF provided its cap has the same dimensions. For reference here's a close up of the M-B cap.

View attachment 55721

Unfortunately it did not attach to the AC Delco DEF bottle I got from my dealer. But I simply refilled the M-B container with fresh supply from the AC Delco bottle and then hooked it back up to my Cruze.

I did this today, outside at a service station, at ten degrees below freezing. In spite of the conditions, and this being my first time, I only had two small drops of DEF to clean up.

This is the Tomko Method.


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Thanks Tomko for sharing the MB hose with kruse adapter idea. Unfortunately we Canadians are getting hosed as MB wants $28 for the hose and MB no longer sells the DEF 10 liter with the required thread size to accept the hose. For me I bought the 1.9 liter DEF with the kruse end and converted it into a funnel.
 

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Discussion Starter · #43 ·
Not sure if its mentioned somewhere didnt read all pages... but GM also has a cap attached filling hose almost identical to the mercedes one shown above.
Part number?
 

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Discussion Starter · #46 ·
Here's a photo of it and the DEF that I have on my phone. View attachment 106545
Thanks for the photo. That's the AC Delco hose. It is very effective at pouring but has no safety consideration for splash, overfill and poor aim.

It is better than nothing. But not comparable to the M-B hose that seals onto the DEF jug AND the DEF spout on the car. No fuss, no muss and no spills.
 

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This may be a dumb question as I have only had to fill mine once so far ( and yes using the jug & funnel was a royal pain) but how does one know when it is full? My CTD here in Canada only states the DEF fluid level as a percentage once it gets low. I have to do the math to guess how much the tank had and what it would take to fill it. I can't see any indication of when it is full. I am not looking forward to the next fill-up, it take two people for gosh sakes. One to hold the funnel & one to poor so slowly so it does come gurgling back up.

I too was under the impression that my GM dealer here in Ottawa would be topping of the DEF when it went in for oil changes. I guess once my freebies are done I will go back to my regular shop when they always top off all the fluids (except gas of course).
 

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This may be a dumb question as I have only had to fill mine once so far ( and yes using the jug & funnel was a royal pain) but how does one know when it is full? My CTD here in Canada only states the DEF fluid level as a percentage once it gets low. I have to do the math to guess how much the tank had and what it would take to fill it. I can't see any indication of when it is full. I am not looking forward to the next fill-up, it take two people for gosh sakes. One to hold the funnel & one to poor so slowly so it does come gurgling back up.

I too was under the impression that my GM dealer here in Ottawa would be topping of the DEF when it went in for oil changes. I guess once my freebies are done I will go back to my regular shop when they always top off all the fluids (except gas of course).
Your DIC will indicate when it is at 35% or lower.
 

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Or you may do like I did today and pull into your local truck stop (I chose Loves, but Pilot and others will be the same) and pull up to a Semi fueling station. Each has a diesel nozzle and a DEF nozzle (as all new trucks require DEF also). The DEF nozzle fits perfectly into the spout and I was able to fill up in just a couple of minutes. Careful when you tilt the nozzle in as residual will spill (but not much). I Paid $14 for 5 gallons which is about half what I pay for the boxes.
 

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Or you may do like I did today and pull into your local truck stop (I chose Loves, but Pilot and others will be the same) and pull up to a Semi fueling station. Each has a diesel nozzle and a DEF nozzle (as all new trucks require DEF also). The DEF nozzle fits perfectly into the spout and I was able to fill up in just a couple of minutes. Careful when you tilt the nozzle in as residual will spill (but not much). I Paid $14 for 5 gallons which is about half what I pay for the boxes.
When you do the DEF and fuel like that, can you swipe you card once, then fill with fuel, then switch to DEF? Or does that require a second swipe of the debit card?

I've done one DEF fill with the 2.5 gallon box. Wasn't difficult but I like the pump idea.
 

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I only filled DEF. The diesel was too expensive. And I actually had to go inside to pay as only certain cards are usable at the pumps at the truck stops (had no idea). But it was definitely worth it as there was less mess and it was significantly cheaper.
 

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By the way, I found that my local recycling place takes the DEF jugs so i don't have to throw them in the trash.
 

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Guess I should have checked up on it. I always tossed them in recycling because they just contained H2O and a trace of Urea which is not a HazMat.
 

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By the way, I found that my local recycling place takes the DEF jugs so i don't have to throw them in the trash.
I hope mine does, because I put them (and anything I deem remotely recyclable) in our recycle bin! Haha.
 

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Great thread! I have a gen 2 and about 3,500 miles on the clock and my DEF is already at about 21%.

Ordered parts from IDParts.com (not MB but same jug and I suspect the same manufacturer?)
[h=1]
AdBlue DEF 10 Liter - $19.99
[/h]https://www.idparts.com/adblue-def-10-liter-p-6356.html




Filler Hose for AdBlue DEF (new style with two adapters) - $18.50

https://www.idparts.com/adblue-def-filler-hose-0005832204-000012499-p-6239.html

 

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I wanted to add some info when it comes to the truck stop pumps for the DEF.

You can use pretty much any credit card in those pumps, however instead of a $75 or $100 hold like the car pumps, it will try for a $500 hold so if you use a bank card, will probably get declined. Only need to swipe it once for both diesel and DEF, you fill the fuel first then you use the DEF pump.
 
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