2021 Mercedes-Benz E-Class coolant capacity
The 2021 Mercedes-Benz E-Class holds about 11.6 to 16.1 quarts of coolant, depending on the engine - the full cooling-system capacity when cold. The factory coolant is Mercedes-Benz MB 325.5 Coolant (pink-violet).
Key takeaways
- The 2021 Mercedes-Benz E-Class holds about 11.6 to 16.1 quarts of coolant total, depending on engine.
- This is the full cooling-system fill with the engine cold.
- Coolant: Mercedes-Benz MB 325.5 Coolant (pink-violet). Refill to the marked level and don't mix coolant types.
| Engine | Capacity | Liters |
|---|---|---|
| 2.0L 4-cyl turbo (264.920) | 11.6 qt | 11 L |
| 3.0L 6-cyl turbo (256.930) | 14.8 qt | 14 L |
| 4.0L 8-cyl turbo (177.980) | 16.1 qt | 15.2 L |
Which coolant the 2021 Mercedes-Benz E-Class takes
The factory coolant is Mercedes-Benz MB 325.5 Coolant (pink-violet). Mixing coolant types can cause sludge and corrosion, so top up with the same product, or drain and refill completely when you switch. Other brands are fine if the jug says they meet MB 325.5 / 326.5.
Source: Blauparts Mercedes-Benz Coolant Antifreeze Information, FCP Euro - How To Pick The Right Coolant For Your Car. Confirm against your owner's manual or the label on the coolant reservoir.
What a coolant change costs
At roughly 2.9 to 4.1 gallons of capacity, the coolant itself is about $44 to $123. A shop charges $70 to $120 for a drain and fill, or $100 to $250 for a full flush. Use the specification the manufacturer lists - mixing coolant chemistries is what turns a cheap service into a water-pump job.
Ranges aggregated from published 2026 US repair-cost and parts price guides, including RepairPal and Car Talk. Prices vary by region, brand, and vehicle - treat these as a sanity check on a quote, not a fixed price. Drain and fill vs flush →
Coolant for your 2021 Mercedes-Benz E-Class
Buy Mercedes-Benz MB 325.5 Coolant (pink-violet), or a coolant that says on the jug it meets the same spec (MB 325.5 / 326.5). Check whether it is premixed 50/50 or concentrate before you pour. To compare prices and reviews:
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