Coolant spec Mercedes B-Class W247 (2018–2025) — type, volume, change interval
Which coolant to use in Mercedes B-Class W247 (2018–2025) — type, colour, system volume and replacement interval.
Cooling System Specifications
| Parameter | Value |
|---|---|
| Make / Model | Mercedes B-Class W247 |
| Production Years | 2018–2025 |
| Coolant type | G30 |
| Colour | blue-green |
| System volume | 6.5 L |
| Mix ratio | 50/50 (concentrate / water) |
| OEM approval | MB 325.6 |
| Replacement interval | every 4 years |
Coolant replacement is time-based, not mileage-based. Corrosion inhibitors degrade over time regardless of how far you drive.
Approved Coolant Brands
MB A 000 989 08 25 / Febi Mercedes / Motul Inugel MB
Mixing Rules
- Do not mix different coolant types (G11/G12/G13) — mixing causes a chemical reaction and sludge formation.
- When topping up, use the same type: G30.
- Always dilute concentrate with distilled water at a ratio of 50/50.
- Freeze protection at 50/50 mix: approximately –37°C.
Checking Coolant Level and Condition
- Check the level in the expansion tank on a cold engine — it should be between MIN and MAX marks.
- Fresh G30 coolant is blue-green. Brown, cloudy or sediment-filled coolant must be replaced immediately.
- Hydrometer test: density at 50/50 mix should be 1.060–1.080 g/cm³.
FAQ
Which coolant should I use in Mercedes B-Class W247?
Type G30 (blue-green), approval MB 325.6. Compatible brands: MB A 000 989 08 25 / Febi Mercedes / Motul Inugel MB.
How much coolant does a Mercedes B-Class W247 hold?
The total cooling system volume is 6.5 L. A partial change will require less — calculate based on the volume drained.
How often should coolant be replaced in Mercedes B-Class W247?
Every 4 years, regardless of mileage. Do not delay — depleted coolant causes corrosion of aluminium engine components.
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