2009 Mercedes-Benz CLS vs. 2010 BMW 123
To start off, 2010 BMW 123 is newer by 1 year(s). Which means there will be less support and parts availability for 2009 Mercedes-Benz CLS. In addition, the cost of maintenance, including insurance, on 2009 Mercedes-Benz CLS would be higher. At 6,208 cc (8 cylinders), 2009 Mercedes-Benz CLS is equipped with a bigger engine. In terms of performance, 2009 Mercedes-Benz CLS (507 HP @ 6800 RPM) has 305 more horse power than 2010 BMW 123. (202 HP @ 4400 RPM). In normal driving conditions, 2009 Mercedes-Benz CLS should accelerate faster than 2010 BMW 123. With that said, vehicle weight also plays an important factor in acceleration. 2010 BMW 123 weights approximately 290 kg more than 2009 Mercedes-Benz CLS.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2009 Mercedes-Benz CLS (631 Nm @ 5200 RPM) has 231 more torque (in Nm) than 2010 BMW 123. (400 Nm @ 2000 RPM). This means 2009 Mercedes-Benz CLS will have an easier job in driving up hills or pulling heavy equipment than 2010 BMW 123.
Compare all specifications:
| 2009 Mercedes-Benz CLS | 2010 BMW 123 | |
| Make | Mercedes-Benz | BMW |
| Model | CLS | 123 |
| Year Released | 2009 | 2010 |
| Engine Position | Front | Front |
| Engine Size | 6208 cc | 1995 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 507 HP | 202 HP |
| Engine RPM | 6800 RPM | 4400 RPM |
| Torque | 631 Nm | 400 Nm |
| Torque RPM | 5200 RPM | 2000 RPM |
| Fuel Type | Diesel | Diesel |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1325 kg | 1615 kg |
| Vehicle Length | 4920 mm | 4360 mm |
| Vehicle Width | 1870 mm | 1748 mm |
| Vehicle Height | 1420 mm | 1411 mm |
| Wheelbase Size | 2860 mm | 2660 mm |
| Fuel Consumption Highway | 13.1 L/100km | 4.8 L/100km |
| Fuel Consumption City | 19.6 L/100km | 7.1 L/100km |
| Fuel Consumption Overall | 16.8 L/100km | 5.7 L/100km |
| Fuel Tank Capacity | 80 L | 51 L |
