According to http://x3.xbimmers.com/forums/showthread.php?t=530507 kmarei says:
The X3 has (2) fuse blocks:
Fuse Block #1 is behind the glove box and is accessed through the removable panel at the far right at the back of the open glove box. The fuses are (5) or (6) inches behind the back of the glove box and will probably take someone with a very thin wrist or better yet, a surgical forceps or very long nose pliers to change. This fuse block houses fuses Nos. 1 through No. 67.
Fuse Block No. 2 is housed in the right rear fender. To access it you must remove the small right rear storage cover (pull firmly on the black hand hold). Then you must remove the plastic "push rivet" at the rear of the insulation cover. Pry the center pin out with a screwdriver or small knife, and then completely remove the plastic "rivet". Then simply roll the insulation cover forward and you will find the fuse block.
Fuse block No. 2 houses fuses Nos. 100 to No. 204.
The sheet listing the fuse locations for BOTH fuse blocks is folded and stored in a slot at the bottom of the fuse block (No. 2).
Or: Try watching this YouTube video: https://www.youtube.com/watch?v=-Ph-KB7LIu0 if I helped you, please let me know. :)
Mr. Williams.
just take it to your mechanic who will fill it with watter and by using a radiator pressure test tool will immediately give you the answer and the cost of repair.
Have you traced the hot wire up to the source to see where is loses voltage, you have to do that. You will need a 12 volt test light, about $5 at any auto parts store or sears.
If it is black sooty smoke injectors are putting to much fuel into the cylinders so they may need to be tested
Whitish grey smoke could be extra oil burning due to busted cylinder rings or head gasket allowing coolant into cylinder
I would suggest taking it to a shop... however if you have the means there is a plug on the transmission that you remove and if fluid drips out it is good if no fluid then add. There is no dipstick
You might have transmission problem. It could be low fluid level or could be an internal transmission failure. I suggest you to have the fluid level checked for quality. Another thing you can try to reset your transmission. BMW transmission would help you to know about the transmission better.