17 13 030 Removing and installing/replacing coolant filler neck (S63)

Necessary preliminary tasks: 

• Drain COOLANT .
• Remove ACOUSTIC INSULATION for bulkhead on left.
• Remove front left WHEEL ARCH COVER

Release screws (1).

Fig 1: Identifying Screws Of Coolant Filler Neck

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Unlock and detach coolant hoses (1) on coolant filler neck.

Fig 2: Identifying Coolant Hoses

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Unlock and detach coolant hoses (1) on coolant filler neck.

Weave out and remove coolant filler neck.

Fig 3: Identifying Coolant Hoses On Coolant Filler Neck

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

CHECK COOLING SYSTEM FOR LEAKS .