Preliminary Work
WARNING: This page is about a different variant/trim than selected.
WARNING:
Hot fluid
- Danger of scalding
- → Let the fluid cool down.
- → Wear personal protective gear.
Information
- Only use the approved cleaning agent "Frostox R Spezial" (see PET).
- Recommended mixture ratio for cleaning is 1:1 (cleaning agent/water).
- Clean for about 10 minutes with the engine running (operating temperature), then drain the cleaning agent and flush with water.
- Coolant hoses and sealing rings swell following long-term contact with engine oil (e.g. when oil and coolant are mixed), so perform visual inspections.
- Always replace seals and O-rings in the cooling system following removal.
- Open other required connection points on vehicles with auxiliary heating if necessary.
- If further cleaning is required, repeat these steps.
- Dispose of coolant additives, coolant and cleaning agents according to the respective, applicable national laws.
- Completely drain coolant from the cooling system.
See specifications for the relevant vehicle model in the documents WM, 193817 DRAINING AND FILLING COOLANT (HIGH-TEMPERATURE COOLING SYSTEM) .
- Have a sufficient quantity of cleaning agent/water mix with the mixture ratio 1:1 ready (depending on the vehicle).