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Mercedes-Benz O 404: the tourist coach, its versions and inspection
Mercedes-Benz O 404 (1991–1999) — the 1990s tourist and long-distance coach, successor to the O 303. We look at the versions, engines and what to check when buying used.
The O 404 in brief
The O 404 is a high-floor tourist coach designed for excursions and long-distance trips. It was widely used in Germany and other European countries, and later many found their way into the fleets of Eastern and Central European operators.
Today, this is an old coach, often bought cheaply for tourist transport, school runs or conversion. Due to its age, the condition of the body, engine and chassis is crucial, not the spec.
Versions — what's the difference?
The O 404 was produced in several versions — standard high-floor (RHD), longer three-axle and especially high (SHD) versions. Different versions have different lengths, axle counts and seating capacities.
When buying, it's worth pinpointing the exact version and its specs, as parts requirements and repair needs can vary. Interior trim depends on the previous operator's choices.
Engines and gearboxes
The O 404 is powered by Mercedes-Benz V-form diesel engines (V6 and V8), designed for heavy-duty coaches. Depending on the year, they meet Euro 1 or Euro 2 standards, so they're banned in many cities' low-emission zones.
Gearboxes are usually mechanical ZF units, with automatics in some versions. Check the clutch and gearbox condition while driving, especially when fully loaded.
What to check when buying a used O 404
First, inspect the body for corrosion — check the sills, wheel arches, door frames, floor, and luggage compartment. In older vans, this is often the most common and costly issue.
Start the engine cold: check for smoke, oil or coolant leaks, and listen for the turbocharger sound. Check the cooling system, as overheating old engines can be expensive.
Check the air suspension, brakes, steering, seats, air conditioning, and electrical installation. Ask for the service history and verify the registration and import documents.
Versions
Names and equipment vary by market and year; we list generally described versions, but check the exact specification in the documents of the specific van.
O 404 RHD
1991–1999Standard high-roof tourer version.
- Mostly two axles
- Simple construction
- Often — high mileage
O 404 RHD-L
various yearsLonger version with greater capacity.
- More seating positions
- Larger luggage compartment
- Often — three axles
O 404 SHD
various yearsEspecially high platform for comfort and luggage.
- Large boot space
- Higher seating position
- More complex construction
Perdaryti
various yearsUsed for other purposes.
- Often — a converted camper or other modification
- Modified interiors
- Check conversion documents
Comparing versions
| RHD | RHD-L | SHD | |
|---|---|---|---|
| Who it suits | For a straightforward tourer | For a larger group of passengers | For long trips with plenty of luggage |
| Number of axles | Mostly two | Often three | Depends on the version |
| Boot space | Standard | Large | Largest |
| Price in the used market (relatively) | € | € | €€ |
The 404 is a budget-friendly tourer with simple mechanics. Before buying, thoroughly check for corrosion and engine condition.
Pros
- Low purchase price
- Simple, well-known mechanics
- Plenty of boot space in high-roof versions
- Robust build
Cons
- Old Euro emissions standards
- High mileage and wear
- Risk of corrosion
Frequently asked questions
What is the O 404's environmental class?
Mostly Euro 1 or Euro 2, so they can't drive into many environmental zones.
How does the O 404 differ from the O 303?
The O 404 is a later generation with a more modern design, comfort, and engine options.
Is it worth buying a used O 404?
If you need an affordable camper van and manage to find a good example, then yes, but a thorough check of the body and engine is essential.
Updated 2026-10-21 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
