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Mercedes-Benz GLC 300 Engine Oil Calculator & Technical Guide
Complete engine oil specifications, capacities, and maintenance procedures for 2016-2025 Mercedes-Benz GLC 300 models with M274 and M254 engines.
GLC 300 Engine Oil Capacity Calculator
Select your model year to get precise oil capacity specifications, recommended oil types, and filter information for your specific Mercedes-Benz GLC 300.
Calculated Specifications
Total Oil Capacity (US)
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With filter replacement
Total Oil Capacity (Metric)
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Litres with filter
Recommended Oil Type
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Viscosity & specification
Oil Filter Part Number
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Example OEM reference
Important Note: These specifications are for reference only. Always verify with your vehicle’s owner’s manual and electronic oil level display. Overfilling can cause serious engine damage.
2. Complete Technical Specifications by Model Year
The Mercedes-Benz GLC 300 underwent a significant engine change in the 2023 model year, transitioning from the M274 to the more advanced M254 engine with 48V mild-hybrid technology. This change affects oil capacity, specifications, and maintenance procedures.
| Model Year Range | Engine Code | Displacement | Oil Capacity (US qt) | Oil Capacity (L) | MB Specification | Viscosity Grade |
|---|
Technical Note: The M254 engine features an integrated starter-generator (ISG) and requires specific low-friction oil (0W-20) to optimize the 48V system’s efficiency. Using incorrect oil may void warranty and reduce fuel economy.
3. Step-by-Step Oil Change Procedure
3.1 Tools & Materials Required
- Correct MB-approved engine oil: As specified by calculator
- Oil filter: Mercedes-Benz OEM or equivalent quality (MANN, Mahle)
- Drain pan: Minimum 8-quart capacity
- Torque wrench: 25-50 Nm range
- Socket set: 13mm for drain plug (M274) / 14mm for M254
- Oil filter wrench: 86mm cap style for cartridge filters
- Funnel: Clean, lint-free
- Shop towels & gloves: Nitrile recommended
3.2 Procedure Steps
- Preparation (10 minutes): Park on level surface. Run engine for 5 minutes to warm oil (60-80°C optimal). Turn off engine and wait 10 minutes for oil drainage.
- Drainage (15 minutes): Remove underbody panel if equipped. Place drain pan. Remove oil drain plug (torque: 25 Nm ± 5 Nm). Allow complete drainage (10-15 minutes).
- Filter Replacement (10 minutes): Remove oil filter cap using 86mm wrench. Replace filter element and O-rings. Lubricate new O-rings with fresh oil before installation.
- Refill (10 minutes): Reinstall drain plug with new crush washer (torque: 25 Nm). Add 90% of calculated oil capacity through funnel. Wait 2 minutes, then check level electronically or via dipstick.
- Final Steps (5 minutes): Start engine, run for 30 seconds, check for leaks. Top up oil to correct level. Reset maintenance indicator through instrument cluster.
| Component | M274 Engine | M254 Engine | Notes |
|---|---|---|---|
| Oil Drain Plug | 25 Nm (18.4 ft-lb) | 30 Nm (22.1 ft-lb) | Always use new aluminum crush washer |
| Oil Filter Cap | 25 Nm (18.4 ft-lb) | 20 Nm (14.8 ft-lb) | Hand-tighten first, then torque |
| Oil Filter Housing | 20 Nm (14.8 ft-lb) | 25 Nm (18.4 ft-lb) | Check for leaks after first start |
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