Coolant: Service and Repair

17 00 005 Draining and topping up coolant (N14, N18)

Special tools required:







WARNING:
Risk of scalding.
Only carry out repair work on the cooling system after the engine has cooled down.







IMPORTANT: Wear protective gloves and safety goggles.







IMPORTANT: For dirt contamination of the cooling system (e.g. by engine oil), the cooling system must be rinsed with water until all dirt contamination is removed.







Necessary preliminary tasks:
Follow notes for carrying out repair work on the cooling system .
After adding coolant, check the cooling system for leaks.







Draining coolant:
Unscrew sealing cap (1) on coolant expansion tank.







Release spring strap on lower coolant hose (1) with special tool 17 2 052.
Detach coolant hose (1). Drain, catch and dispose of coolant.







Adding coolant:
Observe filling capacity.
Observe mixture ratio.
Fill and bleed cooling system.
Check cooling system for leaks.