Mercedes-Benz S-Class W221 5.5 petrol 388PS
5.5 petrol 388PS is one engine in the Mercedes-Benz S-Class W221. Power, economy, and CO₂ below are ranges where the trims or gearboxes differ. Each row in the variant table is one configuration.
Engine summary
- Fuel
- Petrol
- Power
- 387.6 PS
- Combined mpg
- 23.9–24.1 mpg
- CO₂
- 283–286 g/km
- Variants
- 2 variants
- UK dataset
- 81 cars in our dataset
Catalogue registration span: 2005 – 2024. This is the span of records, not a production announcement.
Where this engine is offered
Variants with this engine
2 published variants.
NEDC combined mpg
| Variant | Fuel | Gearbox | Body | Power | Combined mpg | Dataset |
|---|---|---|---|---|---|---|
| S500 5.5 petrol 388PS | Petrol | Automatic | Saloon | 387.6 PS (382.2 bhp) | 24.1 mpg (NEDC) | 21 |
| S500L 5.5 petrol 388PS | Petrol | Automatic | Saloon | 387.6 PS (382.2 bhp) | 23.9 mpg (NEDC) | 60 |
Other engines in this generation
Mpg ranges are not ranked across engines because the test cycle is stored on the variant, not on the engine range.
| Engine | Fuel | Power | Combined mpg range | CO₂ range | Dataset |
|---|---|---|---|---|---|
| 3.0 diesel 234PS | Diesel | 234.2 PS | 33.6–34 mpg | 225–228 g/km | 335 |
| 3.0 diesel 238PS | Diesel | 238.3 PS | 36.7–37.2 mpg | 201–204 g/km | 74 |
| 3.0 diesel 262PS | Diesel | 261.6 PS | 41.5 mpg | 168 g/km | 307 |
| 3.5 petrol 276PS | Petrol | 275.8 PS | 28 mpg | 247 g/km | 42 |
| 5.5 petrol 517PS | Petrol | 516.7 PS | 20 mpg | 340 g/km | 21 |
Related VehicleScore tools
Check your Mercedes-Benz S-Class W221 5.5 petrol 388PS
Enter a UK registration to check a Mercedes-Benz S-Class 5.5 petrol 388PS. This page describes that engine, not one number plate.
How these figures are produced
Specifications and counts come from the VehicleScore UK vehicle catalogue. A count of cars is the number of records in that dataset. It is not UK production, not sales, and not the number of cars currently on the road.
Power is shown in PS where the catalogue stores PS, and in bhp only where bhp is stored separately. Official fuel economy is labelled NEDC or WLTP when the test cycle is known. Figures from different cycles are not ranked together. Empty values are left blank.
The catalogue does not store a revision date, so these pages do not show a last-updated day.