Mr. Overthepond is right.

I live in Europe and have a 5 speed manual 3.0 diesel and have all my fluids ready for a massive fluid session (engine, differentials, transaxle and transmission).

Officially BMW says 1 liter for each diff (use a GL-5 oil, I'm using Redline).
Transaxle is to be 0.55 liter (GL-4, use Redline D4 ATF)
Manual transmssion is listed at 1.5 liters (GL-4, use Redline D4 ATF).

Now for the fun. The transfer case does NOT have a magnetic drain or fill plug. You can buy them for a reasonable price from Cobratransmission.com in Miami.

The differential's also are lacking - the BEST are from a guy in North Carolina (MAGNETIC DRAIN PLUGS) who sells them on the internet. Lifetime oil in a compartment with no filter, very scary.

VERY SCARY: The manual transmission on the X5 (and virtually ALL BMW's after E30 / E32 / E34) do NOT have magnetic drain plugs. I grew up with the 2002 and was always used to a modest bit of shavings that the magnetics held when you changed the transmission oil.

I discovered it this Sat as I drained all these fluids (I had Dimple magnetic plugs for my diff's & engine. Cobra transmission factory magnetic drain / fill plugs for my NV125 transfer case). SO, the Redline went in the transmission, I'll buy the earlier (BMW part number 23 11 7 546 876) magnetic plug and install at a later date.

I needed nearly 3 liters / quarts of Redline ATF for my transfer case & transmission. 1-2 liters/quarts for rear diff, front will be done later - ran out of time.