This S420 CDI 7G-Tronic long base (320 hp) engine was fitted in the W221 Sedan (4-door), which was produced by Mercedes-Benz from 2005 to 2009. In addition to this engine, 20 other engines were also available for this body — their technical data and fuel economy are accessible by clicking the body name at the top of the page.
| City fuel consumption per 100 km | 13litre |
|---|---|
| Highway fuel consumption per 100 km | 7.2litre |
| Mixed fuel consumption per 100 km | 9.4litre |
| Fuel tank capacity | 90litre |
| Cruising range | from 690 to 1 250km |
| Fuel | Diesel |
| Emission standard | EURO IV |
| Top speed | 250km/h |
| Acceleration (0–100 km/h) | 6second |
| Displacement | 3996cm3 |
|---|---|
| Engine power | 320bhp |
| RPM at max power | to 3 600RPM |
| Maximum torque | 730Nm |
| RPM at max torque | 2200RPM |
| Engine type | Diesel |
| Cylinder layout | V-type |
| Injection type | Common Rail |
| Forced induction | Turbocharger |
| Number of cylinders | 8 |
| Valves per cylinder | 4 |
| Bore | 83mm |
| Stroke | 92mm |
| Gearbox | Automatic |
|---|---|
| Number of gears | 7 |
| Drive wheels | Rear-wheel drive |
| Turning circle | 12.2m |
| Seats | 5 |
|---|---|
| Length | 5210mm |
| Width | 1871mm |
| Height | 1473mm |
| Wheelbase | 3165mm |
| Front track | 1600mm |
| Rear track | 1606mm |
| Kerb weight | 2140kg |
| Gross weight | 2660kg |
| Displacement | 520kg |
| Min. boot capacity | 560litre |
| Max. boot capacity | 560litre |
| Permitted road-train weight | 4760kg |
| Body type | Sedan |
| Ground clearance | 150mm |
| Front suspension | Independent, Pneumatic, Lever, Dampers |
|---|---|
| Rear suspension | Independent, Pneumatic, Multi wishbone, Dampers |
| Front brakes | Ventilated disc |
| Rear brakes | Disc |
| City | 15 litres / 100km |
|---|---|
| Highway | 8.3 litres / 100km |
| Average | 10.8 litres / 100km |
Estimated from official figures. Actual consumption varies by driving style and conditions.