It's not surprising that the BMW dealer doesn't know much about the refill process in Europe. However, the big rigs have been using DEF for over 4 years in Europe, and I'll be you'll find bottles (litres) of the fluid at your favorite truck stop. I don't think they call it DEF, so you might ask for Adblue.........they'll probably understand that.

The fill neck for the main tank is near the windshield fluid cap on the passenger side. You'll have to use the orange tool in the trunck to put in the square recess of the plug. Check your owner's manual out for more details. The second refill point is on the driver's side, beneath the air intake tube (you'll have to remove) and it looks just like the primary spout.

Good luck !!

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HP gets you to speed, Torque keeps you there !

1928 Model A Coupe
1957 MGA SOLD
1994 MBZ SL320
2007 Acura RL
2010 X5d 11/13 PCD