17 00 005 Draining and adding coolant (N54)
Special tools required:
- 00 2 030
See MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .
These tasks on the cooling system should only be carried out on an engine that has cooled down!
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:
Use only recommended coolant . See COOLING SYSTEM - OPERATING FLUIDS .
Observe mixture ratio . See COOLING SYSTEM - OPERATING FLUIDS .
Protective measures/rules of conduct:
- Wear protective goggles
- Wear protective gloves
- Observe national/country-specific regulations
Danger 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:
- Follow instructions for working on cooling system
- Remove underbody protection . See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION .
- Remove INTAKE DUCT .
Unclip Bowden cable for engine compartment lid operation from crossbrace transverse reinforcement (1). Detach A/C line from bracket. Release screws on left and right sides. Tightening torque 51 71 4AZ . Remove transverse reinforcement (1).
Draining coolant:
Open cap (1) on coolant expansion tank (2).
Installation:
Close cap (1) until the arrow marks line up.
Open coolant drain plug (1).
Drain, catch and dispose of coolant.
With supplementary radiator:
Open coupling on coolant hose below intercooler.
Drain, catch and dispose of coolant.
Use only recommended coolant .
Observe mixture ratio . See COOLING SYSTEM - OPERATING FLUIDS .
Observe filling capacities . See COOLING SYSTEM - TECHNICAL DATA (N54) .
Observe venting instructions without fail.
Fill and vent cooling system