Hi, If it's the same as the Pertrol E36 coupe, look into the boot, on the right hand side where the First Aid box sit's, remove the plastic tray beneath the First A.Box, I think you will find it there.
Trebor
March 2010
you have to remove spare wheel and elec dome
barry
March 2010
try under the back seat.
ian
March 2010
I can answer this question...
where is the battery located on a 2006 bmw x5diesel?