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2019 Mercedes C-Class Cabrio //Exterior, Interior, Drive//

443 views · Published 21 March 2018 · 6:32 · Indexed 26 October 2026

Channel: Motorward · 2018 · Autos & Vehicles

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Just a few weeks after the world premiere of the saloon and estate the two-door version of the C-Class proves it is also enjoying its new top form with the coupé and cabriolet. Sportiness and driving pleasure have been enhanced with a sharper design, digital cockpit and DYNAMIC BODY CONTROL suspension. New four-cylinder engines, some of which are equipped with 48 V technology (EQ Boost) and the Mercedes-AMG C 43 4MATIC (fuel consumption combined: 9.8-9.2 l/100 km; combined CO2 emissions: 223-212 g/km) now with 287 kW (390 hp) underscore the dynamic nature of this highly emotively appealing C-Class representative. Coupé and Cabriolet will celebrate their world première at the New York International Auto Show. The two-door vehicles will be available at sales partners from July.

The secret of the C-Class's success is partly down to the wide model range, also including two sporty two-door versions: the coupé launched at the end of 2015 and the cabriolet available since the summer of 2016 address the heart and mind in equal measure. The design of the vehicles is one of the main reasons for purchasing in Europe. Both models are produced at the Mercedes-Benz Bremen plant.

A new generation of four-cylinder petrol engines (M 264) is being launched in the new C-Class. The new petrol model is coming initially as the C 200 and C 200 4MATIC with a displacement of 1.5 litres. At the same time these models are equipped with an additional 48-volt on-board network with a belt-driven starter/alternator (EQ Boost). A 2.0-litre variant will follow later.

The combination of a 48-volt on-board network and EQ Boost creates the conditions for additional functions that help to reduce fuel consumption even further, while improving agility and comfort characteristics. When accelerating, EQ Boost can assist the 135 kW (184 hp) engine with an additional 10 kW (14 hp), bridging the brief moment until the turbocharger has built up its full charge pressure. During deceleration, the starter/alternator recuperates kinetic energy and charges the battery.

Other advantages include gliding mode with the engine switched off, and the recuperative brake with intelligent engine stop when the vehicle is coasting: recuperation only begins with overrun cut-off when braking. When the speed falls below a certain minimum level, the powertrain is decoupled and the engine is switched off. This has the advantage of maximum fuel savings through
recuperation together with comfortable vehicle response.

The exhaust gas turbocharger uses a twin-scroll system. CAMTRONIC variable valve timing is also on board. This allows two-stage adjustment of the valve lift on the intake side.

In-engine measures to reduce friction round off the efficiency strategy of the new four-cylinder power unit. These include the Mercedes-Benz patented CONICSHAPE® process, known in-house as conical honing: When form-honing the cylinder walls, the cylinder wall is opened out slightly towards the bottom, so as to reduce friction at the piston skirt for lower wear and fuel consumption.

Alongside the diesel engines, the petrol engines are also equipped with a particulate filter in Europe.

State-of-the-art diesel: C 220 d

The new C 220 d opens up new efficiency dimensions and offers improved performance. The model has been certified in accordance with the latest Euro 6d-TEMP standard. In this diesel engine Mercedes-Benz uses the "step recess" combustion process – named after the shape of the combustion case in the piston. The innovations also include the combination of an aluminium engine block and steel pistons, as well as the further-improved NANOSLIDE® coating of the cylinder walls.

Despite having a lower displacement than its predecessor, reduced to just under two litres, and weighing around 16 percent less, the new diesel powerplant (OM 654) in the C 220 d has an output of 143 kW (194 hp), 18 kW more than the previous engine, and delivers an NEDC combined consumption of 4.9-4.6 (cabriolet: 5.1-4.8) litres per 100 kilometres. This is equivalent to CO2 emissions of 130-121 (136-126) grams per kilometre. Alongside optimised airflow on the intake and exhaust sides and the use of fourth-generation common-rail injection with pressures up to 2050 bar, the fuel saving is due to a reduction in internal friction by around 25 percent. On top of this, the engine is also more compact than its predecessor.

All components relevant for efficient emissions reduction are installed directly on the engine. Through the near-engine configuration the exhaust gas aftertreatment quickly reaches its operating temperature and has low heat loss for efficient emission reduction even at low outside temperatures.

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