If I remember correctly that trans fluid is very expensive. Something like $20/L, my guess is over 5 liters maybe more?

I actually have brand new liter in my closet from my old 4.6iS if you want it. Send me a message, I believe my 4.8iS takes different fluid now

__________________
2004 BMW M3 Individual
2009 BMW E70 X5 35d
2011 BMW E70 X5 35d - Totaled
2009 BMW M3 E90 - SOLD
2006 E53 X5 4.8iS - SOLD
2002 E46 M3 Convertible - SOLD
2006 E46 M3 ZCP - SOLD
2011 E70 X5 35d - SOLD
2000 E39 ///M5 - SOLD
2003 E53 X5 4.6iS - SOLD
2006 E83 X3 3.0i MSport - SOLD
2000 E46 323Ci - SOLD