The Mercedes-Benz Actros is a heavy-duty truck designed for long-distance transport and high-load operation. Correct oil capacity and fluid specifications are essential to ensure engine durability, fuel efficiency, and reliable performance.
This guide covers all key fluid capacities for the Mercedes-Benz Actros, including engine oil, gearbox oil, axle oils, and auxiliary systems.
Engine Oil Capacity (Actros Engines)
Mercedes Actros trucks use OM-series engines such as OM471, OM470, and OM473 depending on configuration.
Engine Oil Specification
- Mercedes-Benz Approval: MB 228.5 / MB 228.51 / MB 228.61 (depending on emission class)
- SAE viscosity: 10W-40 or 5W-30 (low SAPS for Euro 6 engines)
Engine Oil Capacity by Engine Type
| Engine Model | Oil Capacity (with filter) |
|---|---|
| OM470 | ~33–38 liters |
| OM471 | ~35–40 liters |
| OM473 | ~40–45 liters |
⚠️ Exact capacity depends on oil pan version and cooling system configuration.
Gearbox Oil Capacity (PowerShift / G211 / G281)
Transmission Types
- Mercedes PowerShift 3 (most common)
- Manual gearboxes (older models)
Oil Capacity
- Automated transmission: 12–16 liters
- Manual gearbox: 10–13 liters
Transmission Oil Specification
- MB 235.11 / MB 235.14
Axle Oil Capacity
Rear Axle (Single Reduction / Hub Reduction)
- Capacity: 7–12 liters per axle
- Specification: MB 235.20
Front Axle (if driven)
- Capacity: 6–10 liters
Steering System Oil
- Type: Hydraulic steering fluid (older models only)
- Capacity: ~3–5 liters
- Newer Actros: electric steering (no oil required)
Cooling System Capacity
- Capacity: 45–75 liters
- Coolant type: Mercedes-Benz MB 325.5 / MB 325.6
AdBlue (SCR System)
- Tank capacity: AdBlue 25–80 liters (varies by model)
- Consumption: ~3–8% of diesel fuel usage
Fuel Tank Capacity
| Configuration | Capacity |
|---|---|
| Standard | 290–400 L |
| Long-range | 600–1200 L (dual tanks) |
Engine Oil Change Interval
- Standard interval: 80,000–120,000 km
- Severe conditions: 60,000 km
- Depends on oil quality (MB 228.5 / 228.61)
Gearbox Oil Change Interval
- PowerShift: 240,000 km (recommended)
- Manual gearbox: 200,000–300,000 km
Differential Oil Change Interval
- Recommended: 240,000 km
- Heavy-duty use: 180,000 km
Common Oil-Related Problems
1. Oil Consumption Increase
- Turbo wear
- Piston ring wear
- Long idle operation
2. Oil Leaks
- Valve cover gasket
- Oil cooler housing
- Turbo oil lines
3. Oil Dilution
- EGR system issues
- DPF regeneration problems
Oil Pressure Specifications (General)
- Idle pressure: ~1.5–2.5 bar
- High RPM: ~4–6 bar
Recommended Maintenance Tips
- Always use Mercedes-approved oils (MB 228.5 / 228.61)
- Avoid mixing oil standards
- Replace oil filters every service
- Monitor oil level electronically (no dipstick on some models)
- Check for fuel dilution in city operation trucks
Frequently Asked Questions
How much oil does a Mercedes Actros engine take?
Depending on engine type, between 33 and 45 liters.
What oil is used in Actros engines?
Most modern Actros engines use MB 228.51 or MB 228.61 low SAPS diesel oil.
How often should Actros oil be changed?
Typically every 80,000–120,000 km, depending on usage conditions.
Can I use standard truck oil?
No. Only Mercedes-approved oil standards should be used to protect the SCR and DPF systems.
Conclusion
The Mercedes-Benz Actros requires large-volume, high-quality lubricants due to its heavy-duty operation. Correct oil capacity management for the engine, transmission, and axles is essential for long service life, reduced wear, and optimal fuel efficiency.