Mercedes-Benz GLS450 Oil Type and Capacity
Choose the exact model year before buying oil. The eight checked GLS450 service tables give different oil-change quantities across the 2019/2020 boundary. The container must carry the Mercedes-Benz approval required for your vehicle; viscosity alone is not an approval.
What the checked manuals say
The 2017–2019 GLS450 Fluids tables list 7.40 US qt (7 L) with filter. The 2020–2024 tables list 8.90 US qt (8.42 L) with filter. These are table values for an oil change with the filter, not a dry-fill quantity or an instruction to pour in that entire amount without checking the oil level.
All eight hosted rows describe Mercedes-approved synthetic engine oil and list SAE 0W-30, 5W-30, 5W-40 or 0W-40, but do not give a numbered MB approval. Mercedes' 2017 GLS operator manual specifies MB-Approval 229.5 for its gasoline models, says the approval should appear on the oil container, and independently lists 7.4 US qt for the applicable non-AMG gasoline model. This 2017 approval is not a claim about every later GLS450.
For a 2018–2024 vehicle, confirm the current required MB-Freigabe or MB-Approval for its VIN and service interval before choosing a viscosity or product. A seller's claim of “meets MB 229.5” is not the same as an explicit Mercedes approval on the container.
Choose your GLS450 manualEight exact GLS450 Fluids tables
Each link opens the engine-oil row within that year's GLS450 manual selection. The hosted table names a viscosity range, not a numbered oil approval. Check your own vehicle's equipment and current operating-fluid guidance.
Swipe the table left to see the quantity, source note and link.
| Manual selection | Oil change with filter | Hosted oil label | Source |
|---|---|---|---|
| 2017 GLS450 | 7.40 US qt (7 L) | Mercedes-approved synthetic; viscosity options listed, approval number absent | Open Fluids table |
| 2018 GLS450 | 7.40 US qt (7 L) | Mercedes-approved synthetic; viscosity options listed, approval number absent | Open Fluids table |
| 2019 GLS450 | 7.40 US qt (7 L) | Mercedes-approved synthetic; viscosity options listed, approval number absent | Open Fluids table |
| 2020 GLS450 | 8.90 US qt (8.42 L) | Mercedes-approved synthetic; viscosity options listed, approval number absent | Open Fluids table |
| 2021 GLS450 | 8.90 US qt (8.42 L) | Mercedes-approved synthetic; viscosity options listed, approval number absent | Open Fluids table |
| 2022 GLS450 | 8.90 US qt (8.42 L) | Mercedes-approved synthetic; viscosity options listed, approval number absent | Open Fluids table |
| 2023 GLS450 | 8.90 US qt (8.42 L) | Mercedes-approved synthetic; viscosity options listed, approval number absent | Open Fluids table |
| 2024 GLS450 | 8.90 US qt (8.42 L) | Mercedes-approved synthetic; viscosity options listed, approval number absent | Open Fluids table |
Compare oil for the checked 2017 gasoline example
The 2017 operator manual names MB-Approval 229.5. This search is a starting point, not a verified product match. Check that a product actually displays MB-Approval 229.5 on its container, then confirm the correct grade, filter and current specification for your VIN before ordering. For 2018–2024, use your current vehicle approval rather than this 2017 example.
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