Mercedes Benz is launching a new version of the C-Class sedan this fall with a 204 hp version of the company's new 2.2L four cylinder diesel. The C250 CDI BlueEfficiency Prime Edition is powered by a dual turbo version of the common rail injected engine. The addition of the second turbocharger also boosts torque output to 369 lb-ft. That's good enough to match the output of the similarly-configured 2.0L engine used by BMW in a variety of models, including the 123d. The C250 gets through the European driving cycle with a rating of 45.2 mpg (U.S.) with a 6-speed manual transmission while acceleration to 62 mph takes place in 7.0 seconds. The engine gets the latest piezo electric fuel injectors running at a pressure of 29,000 psi. Mercedes will be using variants of this 2.2L with various power levels in both front and rear wheel drive configurations over the coming years. For the C250, the instrument cluster includes an up-shift indicator light to help drivers know the optimum time to shift for maximum efficiency. Mercedes will start C250 production with a limited run of 5,000 fully equipped Prime Edition models.

[Source: Mercedes-Benz]

World premiere of the new diesel engine generation: Mercedes-Benz C 250 CDI BlueEFFICIENCY Prime Edition: Efficiency and driving pleasure on a new plane
Stuttgart - Mercedes-Benz is set to launch a completely new diesel engine generation starting in the autumn of 2008. For its world premiere, the Stuttgart-based car manufacturer will unveil a C-Class model with this new four-cylinder engine. In the C 250 CDI BlueEFFICIENCY Prime Edition, this engine produces, with its 2.2 litres of displacement, 150 kW / 204 hp and 500 Nm of torque. The premiere model can accelerate from a standstill to 100 km/h in just 7.0 seconds, on the way to its top speed of 250 km/h. Notwithstanding these exceptional performance figures, the C 250 CDI BlueEFFICIENCY Prime Edition only consumes an average of 5.2 litres of fuel per 100 km (NEDC), with CO2 emissions of 138 g/km. The engine impresses with its eager responsiveness and smoothness of operation, which can make it a sensible alternative to the higher-displacement six-cylinder engines in future.
The basis of the new C 250 CDIBlueEFFICIENCY Prime Edition is the C-Class saloon of the AVANTGARDE equipment line, in which the sporting genes of the Mercedes-Benz brand come particularly to the fore, most noticeably in the radiator grille with its distinctive louvres and the large, centrally positioned Mercedes star. Among car connoisseurs this design element has been seen, for a long time, as a typical badge of the sportier Mercedes models. Now, in the AVANTGARDE models of the C-Class for the first time the star graces a saloon, as an unmistakable expression of the vehicle's inherent strengths: agility, power and performance, without at the same time neglecting other time-tested C-Class attributes such as safety and long-distance comfort.
The C 250 CDI BlueEFFICIENCY Prime Edition is equipped with 16-inch light-alloy wheels and 205/55 R16 tyres as standard – in addition to this, 16-inch light-alloy wheels in sporty 7-spoke design (likewise 205/55 R16 tyres) and 17-inch light-alloy wheels in 5-twin-spoke design with wide-base tyres (225/45 R17 at front, 205/40 R17 at rear) are available as no-cost options.
Naturally, all the pioneering technical systems of the C-Class are on board as well: for instance, the AGILITY CONTROL package with situation-responsive shock absorber control, the Intelligent Light System with five different lighting functions and the PRE-SAFE® anticipatory occupant protection system.
The extensive standard equipment also includes the Audio 20 infotainment system. This features, among other things, a keypad to enter telephone numbers and radio frequencies, as well as a Bluetooth interface that connects the mobile phone wirelessly with the hands-free feature. Floormats with the lettering "Prime Edition" draw attention to the special status of the new model. Aluminium trim (optional: bird's-eye maple) and other stylish details accentuate the sporty, effortlessly superior appearance of this model.
A better performing and more economical diesel engine based on innovative technology
Exemplary figures in terms of power output, consumption and emission characteristics are achieved by the new engine thanks to the implementation
of a whole package of innovative technologies. This includes among other things:
  • a maximum ignition pressure of 200 bar,
  • fourth-generation common-rail technology with a rail pressure increased by 400 bar to 2000 bar, as well as a new piezo-injector concept with direct nozzle needle control for greater flexibility in injection timing, leading to smoother running of the engine,
  • larger, variable oil spray nozzles and variable water pump,
  • dual-stage supercharging,
Another design innovation is the camshaft drive positioned at the rear. This way, with a north-south installation design and engine bonnet rising towards the rear, it is possible to comply even better with pedestrian protection regulations.
Apart from exceptional power output figures, the new powerplant offers significantly improved torque build-up from low engine speeds, compared to its predecessor model. The benefit of this is that in everyday driving situations it enables low-consumption driving at low engine speeds. In addition, the new engine will assume market leadership in terms of untreated exhaust emissions. Already today, it complies with the future EU5 emissions standards and, beyond that, has the potential to comply with the EU6 and BIN5 standards as well.
A promising future for the new four-cylinder diesel engine
For an engine of its displacement, it is exceptionally compact, so that it can be fitted in different installation spaces. Beginning in 2008, this new four-cylinder diesel engine will replace four of the existing diesel engines at Mercedes-Benz. It can be installed either lengthways or crossways in various model series, and several power rating variants will be available. Apart from the C-Class, the engine will also be installed in the E-Class, in the new GLK-Class and in the future E-Class Coupé. With its impressive output figures, the new engine will replace higher-displacement engines in heavier vehicles, where it will be able to reduce consumption effectively through this "downsizing".
State-of-the-art production with new machine systems
The four-cylinder engines will be produced entirely in Germanyin the
Mercedes-Benz Powertrain co-ordinated production system – the basic engine originates in Untertürkheim, while final assembly takes place in Kölleda/Thuringia. Mercedes-Benz has set up its own production facilities for the new four-cylinder diesel engine generation incorporating state-of-the-art production processes. The main features of this include innovative machine systems, intelligent robot technology and further improved ergonomics in the assembly areas, as well as comprehensive quality control measures and increased flexibility. Mercedes-Benz is expected to produce up to 700,000 units of this modern engine per year.
Ingenious fine detail work reduces consumption
In the Mercedes-Benz C 250 CDI BlueEFFICIENCY Prime Edition the new diesel engine is combined with a sporty six-speed manual transmission with overdrive. This too, contributes to the great efficiency of the model. Furthermore, Mercedes-Benz engineers have drawn up an additional package of measures in order to achieve the most exceptional consumption figures. The package includes among other things:
  • aerodynamic finishing touches, with particularly airflow-enhancing exterior-mirror housings as well as smooth underbody cladding;
  • newly developed tyres that reduce rolling resistance by 10 percent;
  • an efficient energy-management system with adaptive power steering, which with the help of an additional valve, reduces the output pressure of the power-steering pump when it is not required.
Useful information: new gearshift and consumption display on dashboard
Experience from Mercedes-Benz eco-training shows that the driver, too, can save fuel by adopting an energy-conscious style of driving – and also do that without compromising driving pleasure. In the C 250 CDI BlueEFFICIENCY Prime Edition a newly-developed gearshift display on the dashboard assists the driver by informing him of the best moment to shift gear in order to save fuel. In addition to this gearshift recommendation, the instrument cluster shows the precise current fuel consumption.
Prime Edition limited to 5000 units
The C 250 CDI BlueEFFICIENCY Prime Edition model can be delivered in obsidian black, palladium silver or iridium silver. It is also optionally available in the special paint finish diamond white metallic. The sporty appearance can be emphasised even more forcefully with the optional AMG sports package, which includes distinctively-styled front and rear aprons as well as side skirts.
Production of the C 250 CDI BlueEFFICIENCY Prime Edition is limited to 5000 units. It is a consummate performer in terms of its sportiness, environmental protection and economic efficiency. Its price (including VAT) is 40,638.50 euros.

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