How much oil goes into a 2018 Mercedes GLS 450?

The 2018 Mercedes GLS 450 requires approximately 8.5 quarts (or about 8 liters) of engine oil when using a filter. It's important to check the owner's manual for the exact specifications and to ensure proper oil type is used, typically a synthetic oil meeting Mercedes-Benz standards. Always verify the oil level after filling to avoid overfilling.