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Mercedes doubles electric-only driving range of new C-Class plug-in hybrid

Mercedes expects that many more customers will opt for the new C-Class plug-in hybrid than the current plug-in due to the much longer range. (Mercedes-Benz AG - Global Commun/Daimler AG)
February 25, 2021 07:02 AM

The new Mercedes-Benz C-Class sedan will have a plug-in hybrid version that can be driven in electric-only mode twice as far as its predecessor, thanks in part to a more powerful battery.

The estimated range of 100 km (62 miles) makes the C-Class the third plug-in hybrid from Mercedes to hit the triple-digit mark after the GLE crossover and S-Class sedan.

During the online unveiling of the new-generation C-Class on Feb. 23, Markus Schaefer, Mercedes' chief operating officer, said the C-Class plug-in hybrid will set the benchmark in its segment and will allow drivers to comfortably use electric power for everyday journeys and hybrid power on long distances.

Mercedes expects that many more customers will opt for the new C-Class plug-in hybrid than the current plug-in due to the much longer range.

"We will see a much, much larger share of plug-in hybrids in the future due to the very competitive package," Dirk Fetzer, head of product management for the C-Class, said during a briefing with journalists.

Long range is considered key to ensuring that owners of plug-in hybrids drive their vehicles in zero-emissions electric mode as much as possible instead of using the car's gasoline or diesel engine.

Automakers are accelerating launches of full-electric cars to reduce their CO2 footprint and some such as Jaguar, Bentley and Ford of Europe intend to drop combustion engine cars entirely and offered only battery-powered vehicles.

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But plug-in hybrid drivetrains, which combine a combustion engine and an electric motor to reduce emissions, will be relevant for many years because their substantially longer electric range makes them more attractive to buyers, said Ola Kallenius, CEO of Mercedes parent Daimler.

"It really becomes a sensible option where literally from Monday through Friday you can drive emission free, but you still have the combustion engine to give you any flexibility you need," he said during an earnings call on Feb. 18.

The C-Class has the fourth-generation of Mercedes's plug-in technology. The first new C-Class plug-in hybrid with a 2.0-liter, four-cylinder gasoline engine and a 95-kilowatt electric motor will arrive in European showrooms in the autumn, a few months after the launch in June of the regular C-Class models, Mercedes said. A diesel plug-in hybrid will also follow.

The 96-cell battery pack has a total capacity of 25.4 kilowatt-hours that increases the electrical range to 100 km.

The100-km range of the new C-Class under Europe's WLTP test regime compares with the 54 km that the outgoing C 300 plug-in hybrid could drive on one charge. The 54-km figure is based on Europe's previous NEDC testing cycle that is less reflective of real-world performance.

Mercedes C-Class wagon 2021 Thanks to the new flat positioning of the battery pack in the C-Class plug-in hybrid, the length of the luggage compartment floor of the wagon version has increased by 63 mm to 1043 mm. The height of the luggage compartment has increased by 150 mm to 732 mm. (Mercedes-Benz AG - Global Commun/Daimler AG)

The new C-Class plug-in hybrid comes for the first time with a flat loading bay so that the battery pack no longer creates an uneven surface in the cargo area of the car's rear.

Mercedes achieved its  2020 CO2 fleet reduction target mandated by the European Union last year by relying on plug-in hybrids sold in its home market of Germany.

Thanks to models such as the GLC 300 de 4MATIC diesel plug-in, Mercedes sold more plug-in hybrid vehicles in Germany than rivals Audi and BMW combined.

Environmental groups have been lobbying lawmakers to end what they claim is overly beneficial treatment of plug-in hybrids, because they produce anywhere from twice to three times their certified CO2 emissions.

This is because plug-in hybrids are popular with corporate customers, whose employees pay lower company car taxes, while management likes the generous subsidies and low certified CO2 emissions that look good on paper.

The incentives for users to regularly charge their vehicles, however, is often not sufficient because gasoline and diesel costs are typically paid by the company, while charging a plug-in hybrid's battery at home is not.

As a result, a recent study conducted by the Fraunhofer ISI Institute said that plug-in hybrids must achieve a real range of about 100 km to ensure they are more frequently driven in electric mode.

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