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Mercedes-Benz R-Class: engines, trims and what to check
The Mercedes-Benz R-Class is a large car produced from 2005 to 2013 with up to six seats, blending the traits of an estate, coupe and SUV. We look at the engines you'll find on the used market, how the trims differ and what to check before buying.
R-Class in brief
The R-Class is a long car with three rows of seats and up to six seats, which Mercedes-Benz introduced as an alternative to large coupes. It combines spacious interiors with a luxurious cabin and comfortable driving.
The R-Class is rarely found on the used market, making it a specialist choice for those who need plenty of space and comfort without the classic coupe image.
Trims and choices
The R-Class was made in one generation (W251), and around 2010 it was refreshed: the front end, interior details and some equipment were changed. Refreshed models usually have more modern equipment and more efficient engines.
Trim names indicate the engine – for example, R 320 CDI or R 350. When choosing, pay attention to the engine and whether the car has air suspension and four-wheel drive.
Engines and gearboxes
Most commonly found are V6 diesel engines (e.g., 3.0-litre CDI) and a 3.5-litre V6 petrol engine. More powerful versions offered a V8 petrol engine. Most cars have four-wheel drive, 4MATIC.
The gearbox is a seven-speed automatic. It's usually reliable, but it's important to check that the oil has been changed on time.
What to check when buying a used R-Class
Some cars have air suspension: check if it holds its height, if there are no leaks, and if all modes work. Repairs can be expensive.
In the diesel variant, check the turbo, fuel system, and particulate filter, especially if the car has been driven a lot in the city. The engine should run smoothly, without unusual noises.
Test all the electronics: seats, climate control, multimedia, sensors. The car is large and heavy, so check the brakes and suspension.
Versions
Names and equipment vary by market and year, so the most commonly found versions by engine are listed below.
R 320 CDI
2005–2013The most common diesel version.
- 3.0-litre V6 diesel engine
- Often — 4MATIC all-wheel drive
- Often — automatic transmission and air suspension
R 350 CDI
After 2008More powerful diesel version.
- 3.0-litre V6 diesel engine with higher output
- Often — 4MATIC all-wheel drive
- Economical for long-distance driving
R 350
2005–2013Petrol version.
- 3.5-litre V6 petrol engine
- Often — 4MATIC all-wheel drive
- Quieter engine, but higher fuel consumption
R 500
2005–2013The most powerful commonly encountered version.
- V8 petrol engine
- Often comes with four-wheel drive and air suspension
- Luxury trim and high fuel consumption
Comparing the versions
| R 320 CDI | R 350 CDI | R 350 | R 500 | |
|---|---|---|---|---|
| Who it suits | For daily driving | For daily driving, more power | For occasional driving | For power and comfort |
| Alloy wheels (most often) | 17–18 inch | 18–19 model year | 2018 model year | 2019 model year |
| Engine | 3.0 V6 diesel | 3.0 V6 diesel | 3.5 V6 petrol | V8 petrol |
| Price in the used market (relatively) | Mid-range | Mid-range | Mid-range | High-end |
For most buyers, the best choice is the R 320 CDI or R 350 CDI with proven technology. The R 500 is worth considering only if you're prepared for high fuel costs and maintenance.
Pros
- Very spacious and comfortable interior
- Ideal for long journeys
- Option for six seats
- Luxurious trim and rich equipment
Cons
- High fuel consumption
- Repairs and maintenance can be expensive
- Rare model – limited choice
Frequently asked questions
Who is the R-Class for?
It's for those who need plenty of space and comfort: large families or long trips with luggage. It's a midway solution between an estate and an MPV.
Which R-Class engine is best?
For frequent drivers, the diesel R 320 CDI or R 350 CDI are ideal. The petrol R 350 is quieter, but fuel consumption is higher.
Does the R-Class have four-wheel drive?
Most cars come with 4MATIC, but double-check the specific car's drivetrain when buying.
Updated 2026-10-17 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
