WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, 2001 BMW X5, and 2000 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Connect up MoDiC or BMW DIS.
Interrogate DME fault memory.
Note down fault messages stored in memory.
Further information on troubleshooting in line with DIS or MoDiC instructions.