The GLC300 typically requires about 5.7 quarts of engine oil with the filter, with exact amounts varying slightly by model year and engine variant. Always verify the precise specification in your owner’s manual or on the Mercedes-Benz service sheet for your vehicle.
Oil capacity by model year and engine variant
Below are the typical capacities you can expect when servicing a GLC300’s engine. Exact figures can vary by year and configuration, so refer to the manual or dealer data for your specific VIN.
- Typical capacity for the GLC300 (2.0L turbo inline-4) models ranging roughly from 2016 to 2024: about 5.7–6.0 quarts (5.4–5.7 liters) of engine oil when performing an oil change with a new filter.
- Some service documentation lists a maximum near 6.0 quarts after a full oil change including the filter; the difference is generally within 0.3 quart depending on how the oil is drained and refilled.
In practice, start with about 5.7 quarts, then check the dipstick with the engine warm and on a level surface. Add small amounts as needed to reach the proper level on the dipstick.
How to check and change the oil safely
Follow these steps to ensure you get the right oil quantity and level for a GLC300 service.
- Park on level ground, apply the parking brake, and allow the engine to cool slightly if it was recently driven.
- Drain the old oil and replace the oil filter according to the vehicle’s service manual.
- Begin by adding 5.7 quarts (5.4 L) of the recommended synthetic oil as specified in your owner's manual or the engine bay sticker (the GLC300 commonly uses 0W-20 or 5W-30 depending on year and market).
- Check the oil level with the dipstick. If the level sits below the minimum mark, add small increments (about 0.25 quart) until the level is between the min and max marks.
- Run the engine for a couple of minutes, then recheck the level again with the engine off on a level surface. Top up if necessary and reset any maintenance lights if applicable.
Always dispose of used oil and filters at an appropriate recycling facility, and consult the Mercedes-Benz service manual or a dealer for the exact oil grade and capacity for your exact model year and market.
Summary
For most GLC300 models, plan on about 5.7 quarts of engine oil with a new filter, with up to about 6.0 quarts possible to reach full capacity depending on the year and engine variant. Always verify the exact specification in your manual or with a dealer, and perform a careful dipstick check after an oil change to ensure proper level.