Disconnect the refrigerant line from the expansion valve

CAUTION: Residual pressure in the heating and air conditioning system.
Injury hazard!

Wear safety goggles and protective gloves when disconnecting the refrigerant line.
Close the refrigerant lines with seal plugs.

For version A:
Open the holder (1) on the refrigerant line (2) .

Courtesy of BMW OF NORTH AMERICA, INC.
For version B:
Open the holder (1) on the refrigerant line (2) .

Courtesy of BMW OF NORTH AMERICA, INC.
Protect the oxygen sensor cable (1) from mechanical damage.
Loosen nut (2) .
Disengage hose support (4) .
Remove the refrigerant line (3) and set it aside.

Courtesy of BMW OF NORTH AMERICA, INC.