Unscrew screw connection of the upper oil sump section (all-wheel drive)

Oil sump screw connection 

Fig 1: Oil Sump Upper Section Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening sequence of the oil pan

Prerequisite 

• Unscrew screw connection in sequence (25) to (3).
• Protect the oil pan from falling with the help of a second person.
• Loosen screws (1) and (2).
  Fig 2: Oil Sump Upper Section Screws Loosening Sequence

  Courtesy of BMW OF NORTH AMERICA, INC.