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Mercedes-Benz Actros: generations, cabs, engines, and what to check
The Mercedes-Benz Actros is a heavy tractor unit and chassis, and one of the most common long-haul trucks on Lithuanian and European roads. We look at the differences between Actros generations and cabs, the engines and gearboxes used, and what to check when buying a used Actros.
Actros at a glance
The Actros has been produced since 1996, going through several generations over that time. It is most commonly purchased as a 4x2 tractor unit for international haulage, but 6x2 tractor units and rigid chassis with a lifting or steering rear axle are also available, along with 6x4 and 8x4 versions for heavier-duty tasks.
The model designation usually indicates the main specs: the first two digits show the gross vehicle weight class in tonnes, and the others represent the engine output divided by ten. For example, the 1845 is roughly an 18-tonne class truck with an engine of around 450 hp, and the letters LS usually designate a tractor unit.
The Actros is praised for its comfortable cabs, robust engineering, and extensive service network. Since 2013, Mercedes-Benz has offered the separate Arocs model for the construction sector, meaning newer Actros trucks are mostly focused on trunking and long-haul transport.
Generations — what's the difference
The first three generations (1996–2011, often referred to as MP1, MP2, and MP3) featured V6 and V8 diesel engines. Today these are the cheapest Actros trucks on the market, but most have very high mileages and generally comply with older Euro standards, making them better suited for local work than international runs.
The fourth generation (2011–2018, MP4) was a clean-sheet design: a new cab, inline six-cylinder engines, and Euro 6 compliance. This is the most popular generation on the used market — supply is high, and many trucks feature Predictive Powertrain Control (PPC), which helps save fuel.
The fifth generation (from 2019, MP5) looks similar to the fourth on the outside, but gained a digital instrument cluster, more driver assistance systems, and often MirrorCam cameras instead of traditional mirrors. The Actros L has also been offered since 2021, featuring more spacious cabs and high-end equipment.
Engines and gearboxes
Older generations mostly used V6 (OM 501 LA) or V8 (OM 502 LA) engines. The second and third generations introduced the BlueTec system with AdBlue, enabling compliance with Euro 4 and Euro 5 standards.
Since the fourth generation, inline six-cylinder engines have been used: primarily the 12.8-litre OM 471 (approx. 420–530 hp), and less commonly the smaller 10.7-litre OM 470 or the range-topping 15.6-litre OM 473. Euro 6 engines feature an AdBlue system and a particulate filter.
Early Actros trucks often featured the Telligent semi-automated transmission, while newer ones use the Mercedes PowerShift automated manual gearbox. A retarder is also commonly fitted, which brakes via the engine or transmission to save the service brakes.
What to check when buying a used Actros
Check mileage and engine operating hours against service history and tachograph data — trucks often cover more than 100,000 km per year. Ask for a diagnostic report: it shows fault codes, engine load history, and sometimes fuel consumption data.
Test the gearbox: gears should shift smoothly without hesitation or clunking, and the clutch must not slip. Check the operation of the retarder, the AdBlue system, NOx sensors, and the particulate filter — repairing these components is often expensive. On older trucks, it is also worth checking the pneumatic system for leaks.
Inspect the chassis frame (for cracks, welds, and heavy corrosion), the fifth wheel coupling, the cab suspension, and the interior. Make sure the tachograph is functional, calibrated, and that the vehicle meets the Euro emissions standard you require.
Cabs
Cab names and equipment vary depending on the generation and production year; the following are the most common Actros cabs found in Europe.
MegaSpace
Generations 1–3The largest sleeping cab for long-haul transport from the older generations.
- High roof and flat floor
- Often features two berths
- Plenty of overhead storage lockers above the windscreen
ClassicSpace
Generations 4–5A lower-roof cab, often chosen for distribution and regional work.
- Low roof
- Often features a single berth
- Lighter and cheaper than higher-roof cabs
StreamSpace
Generations 4–5A medium-height cab offering a good balance between space and aerodynamics.
- Medium-height roof
- 2.3 or 2.5 m wide
- Often features one or two bunks
BigSpace
Generations 4–5A high-roof cab for international transport.
- 2.5 m wide, flat floor
- Standing height throughout
- Often equipped with a refrigerator and auxiliary heating
GigaSpace
Generations 4–5The most spacious cab for drivers who spend extended periods living in the truck.
- Highest roof and flat floor
- Maximum storage space
- Often features higher-spec seats and trim
Actros L
From 2021The top-of-the-range Actros version featuring exclusively 2.5 m wide cabs.
- StreamSpace, BigSpace, or GigaSpace cab
- Improved sound insulation and interior trim
- Often equipped with more advanced driver assistance systems
Comparison of Generation 4–5 cabs
| ClassicSpace | StreamSpace | BigSpace | GigaSpace | |
|---|---|---|---|---|
| Best suited for | Distribution and regional duties | Long-haul transport | Long international hauls | Long-distance hauling and comfort |
| Roof | Low | Medium | High | Super high |
| Cab width (typically) | 2.3 m | 2.3 or 2.5 m | 2.5 m | 2.5 m |
| Used market price (relative) | € | €€ | €€ | €€€ |
For long-haul operations, buyers typically opt for the StreamSpace or BigSpace cab paired with a 4x2 tractor unit and the OM 471 engine. GigaSpace is worth considering if the driver lives in the cab for weeks at a time, while ClassicSpace is better suited for shorter regional runs.
Pros
- Abundant supply and a wide service network
- Comfortable, spacious cabs for long-distance driving
- Fuel-efficient fourth- and fifth-generation engines
- Capable automated PowerShift transmission
Cons
- Repairs for Euro 6 emissions systems (AdBlue, DPF) are expensive
- Older generations usually have very high mileages
- Fifth-generation electronics and MirrorCam are more complex to repair
Frequently asked questions
What do the numbers in the Actros name mean, e.g., 1845?
The first two digits indicate the gross vehicle weight class in tonnes, while the last two represent the approximate engine power divided by ten. Thus, the 1845 is an 18-tonne class truck with an engine producing around 450 hp, and the 2545 is a three-axle version, typically 6x2.
Which Actros generation should you choose for international transport?
Generally, the fourth or fifth generation with a Euro 6 engine, as many clients and road toll systems favor newer Euro emissions standards. Older generations are cheaper but better suited for local work.
Is it worth buying an Actros with MirrorCam?
MirrorCam reduces aerodynamic drag and improves visibility in the dark, but it takes some getting used to, and replacing damaged cameras or displays is more expensive than conventional mirrors. Before buying, check that both cameras and screens work without glitches.
What mileage should a used Actros have?
Tractor units often cover 100,000–150,000 km per year, meaning a five- or six-year-old vehicle frequently exceeds half a million kilometers. A clear service history and the condition of the engine and transmission matter far more than the odometer reading.
Updated 2026-10-09 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
