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DEF (Urea) for 335d
I haven't had to do this yet, but I did ask the dealer when I bought it how to DIY the refill. My notes at this point are skimpy, but what I noted was that I should push in the little panel bear the left rear wheel and fill the top reservoir. There is a top and bottom reservoir opening. What I am wishing to confirm is whether you fill both reservoirs in some sequence, or just the top, or just the bottom?
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2021 X3 M40i: M Sport Differential, Adaptive M Suspension.
Previous BMWs: 1971 BMW 2002, 1973 BMW R75/5, and 2011 BMW 335d
Previous Other Vehicles: '67 Cougar, '70 911e, '86 Jetta Diesel, '05 and '12 Foresters, et al.
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