Coolant: Service and Repair

17 00 005 Draining and adding coolant (N74)

Special tools required:





Warning!
Risk of scalding!
The repair work on the cooling system should only be carried out on an engine that has cooled down!





Important!
Lifetime coolant filling:
Never reuse used coolant!
When replacing and removing components which rely on the corrosion protection effect of the coolant, it is essential to change the coolant. The cooling system must therefore be drained and refilled.

In the case of other removal work involving the draining of partial quantities of coolant, replace these quantities which have been drained with new coolant.

Installation note:
Use only recommended coolant.

Observe mixture ratio.





Protective measures/rules of conduct:
^ Wear safety goggles
^ Wear protective gloves
^ Observe national/country-specific regulations





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!





Important!
Risk of slipping due to coolant on the floor.
Risk of injury!

Catch and dispose of drained coolant in drip tray (1) and if necessary special tool 00 2 030 (universal hydraulic lifter).

Recycling:
Observe country-specific waste disposal regulations.





Necessary preliminary tasks:
^ Remove front underbody protection





Draining coolant:
Open cap on coolant filler neck.

Installation note:
Close sealing cap (1) until the arrow marks line up.





Unlock and detach coolant hose (1) from radiator.

Drain, catch and dispose of coolant.





Adding coolant:
Use only recommended coolant.

Observe mixture ratio.

Observe filling capacities.

Fill and vent cooling system.

Observe venting instructions without fail.





Assemble engine.

Check cooling system for leaks.