Connect fuel line and fuel tank vent line

WARNING: Working on fuel system. 
Risk of fire! Danger of explosion! 

• When working on the fuel system, make sure the workstation has sufficient ventilation, e.g., by means of extraction.
• Tightly seal off open lines and connections; collect any leakage fuel directly at the point of exit.
• No fire, sparks, open flames or smoking.

NOTE: TECHNICAL INFORMATION 
Make sure that the connections are locked correctly. The locks must engage audibly.

• Connect and lock fuel line (1)  .
• Check fuel system for leak tightness.
• Connect tank vent line (2)  and lock.

Courtesy of BMW OF NORTH AMERICA, INC.