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Fill and vent the high-temperature coolant circuit

NOTE: RISK OF DAMAGE 
Prohibited activation of the high-voltage system when the coolant is drained. 
Damage to components (in high-voltage systems). 
  • It is mandatory  to fill the coolant circuit before  activating the high-voltage system.
G14435119Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: TECHNICAL INFORMATION 
It is mandatory  to fill the cooling system before bleeding.
Fill both  the circuits for high and low-temperature coolant circuits.