Mercedes sell a tube that fits their large size DEF bottle and the X5 fill stud. I transfer the content of a VAG DEF container in to the MB one and then attach it to the X5. I will make a picture of the items soon and post them.
Last time I filled, I put 6 gallons in the primary tank and next time it screams I will do the remainder of the last container plus one full one.
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2003 4.4i black ext./black int./black headliner (kid's runabout)
2014 535d X-drive, M package, silver/black interior
Sold but not forgotten:
2009 E70 35d, black ext./black int./black headliner (sold 2021)
2006 4.8iS Le Mans blue/cream int./black headliner, SOLD in 2012 sadly...
Other hardware:
2015 Cayenne S (wife's new DD and definitely wroooommmmm)
2016 Tundra 1794 edition crew cab, luxo hauler
2005 Tundra crew cab, weekend hauler. Sold after 150k very happy miles.
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