Energy efficiency: Economy on four wheels

A revised all-wheel-drive powertrain, the outstanding aerodynamics and the intelligent lightweight design are the primary reasons for the high energy efficiency of all the new GLC models. The conventional diesel and petrol models boast significant reductions of up to 19 percent in both fuel consumption and CO2 emissions in comparison to the previous generation, while at the same time improving performance.
GLC 220 d 4MATIC
GLC 250 d
4MATIC
GLC 250
4MATIC
Output, kW/hp
125/170
150/204
155/211
Torque, Nm
400
500
350
Fuel consumption, l/100 km
5.0 - 5.5
(6.1 - 6.5)
5.0 - 5.5
(6.1 - 6.6)
6.5 - 7.1
(7,5 - 7,9)
∆ Consumption %
-19
-19
-12
CO2 g/km
129 - 143
(159 - 169)
129 - 143
(159 - 169)
152 - 166
(173 - 180)
 ∆ CO2 g/km %
-19
-19
-12
0-100 km/h
8.3
(8.5)
7.6
(8.0)
7.3
(7.9)
Vmax km/h
210
(205)
223
(210)
223
(215)
() Figures for the previous model
 
Mercedes-Benz is also offering a plug-in hybrid for the first time in this market segment: The GLC 350 e 4MATIC boasts minimal fuel consumption and emissions while offering performance on a par with that of a sports car. It is also the first plug‑in hybrid in this market segment with permanent all-wheel drive, which also performs convincingly off-road. This version supersedes the previous GLK 350 4MATIC model with a conventional petrol engine and similar performance data. A comparison of fuel consumption, emissions and performance reveals the superiority of the plug-in hybrid concept particularly vividly:
GLK 350 4MATIC
GLC 350 e
4MATIC
∆ %
Output, kW/hp
225/306
235 / 320*
+4.6
Torque, Nm
370
560*
+ 51.4
Fuel consumption, l/100 km
8.1 - 8.6
2.6
- 70
CO2 g/km
189 - 199
60
- 70
0-100 km/h
6.5
5.9
- 9.2
*System output
 
In addition, the GLC 350 e 4MATIC can cover up to 34 km in zero-emission all-electric mode, with a top electric speed of 140 km/h. And thanks to optimised integration of the plug-in technology it furthermore offers outstanding cargo space for a plug-in hybrid at 395 / 1445 litres.
Individual solutions for maximum efficiency
Compared to its competitors, Mercedes-Benz is taking a very individual approach with its plug-in hybrids. The decisive difference is this: the electric motor in the transmission bell housing between the internal combustion engine and 7G-TRONIC is connected to the transmission's input shaft, and not to the crankshaft of the internal combustion engine as is usual. This means that the wet clutch which inherently replaces the hydrodynamic torque converter can cope with all operating situations. A further clutch to disengage the electric motor from the transmission is unnecessary, increasing the energy efficiency of the entire hybrid system:
  • when the GLC 350 e 4MATIC is driving fully electrically, the wet clutch is disengaged while the internal combustion engine is decoupled and switched off.
  • The clutch likewise remain disenaged during energy recuperation, the electric motor acting as a generator and using the GLC's flywheel mass to charge the battery.
  • The wet clutch is engaged during boost and sailing operation, or in CHARGE mode, and the intelligent hybrid control system actuates the electric motor according to current power requirements.
  • The clutch remains engaged when driving with the internal combustion engine alone, and the intelligent hybrid control system switches the electric motor to free-running mode.
Just like its plug-in big brother in the S-Class, the GLC 350 e 4MATIC offers all the characteristic comfort and efficiency systems. The most important facilities at a glance:
  • Silent start: the vehicle starts virtually silently and runs in electric mode. At this point the combustion engine is generally kept switched off.
  • Boosting: The electric motor kicks in to boost the output of the combustion engine by up to 85 kW, turning the GLC 350 e 4MATIC into a sports car. Acceleration from 0 to 100 km/h takes only 5.9 seconds.
  • Energy recuperation: Energy is recovered during braking, and fed to the battery. This energy can then be used at a later stage for electric driving or the boost function.
  • Haptic accelerator pedal: Supports fuel-efficient driving. A resistance point indicates the maximum available electric output. A double impulse signals that the driver should remove their foot from the accelerator pedal in order to switch off the combustion engine and decouple it from the drive train.
  • Intelligent HYBRID: Intelligent operating strategy for hybrid vehicles, anticipates the course of the road and the traffic situation for maximum efficiency. This includes radar-based recuperation, an anticipatory shifting and operating strategy, a route-based operating strategy and ECO Assist
  • Pre-entry climate control: The desired interior climate can be set before starting your journey – cooling in the summer, heating in the winter. This function can be activated via a pre-set departure time or via smartphone using the Mercedes connect me app.
  • Retrieval of vehicle status: It is additionally possible to control the charging process or to check the charge status and the current electric range via the Mercedes connect me app
The GLC 350 e 4MATIC offers four basic operating modes which are available in the DYNAMIC SELECT driving programs ECO and COMFORT:
  • Hybrid: All hybrid functions, such as electric mode, boost and recuperation are available and are deployed for optimum fuel efficiency.
  • E-mode: used for all-electric driving – for example in inner-city areas or because the battery holds sufficient charge for the remainder of the journey.
  • E-Save: the charge status of the battery is maintained – for example to allow all-electric driving in an environmental zone at a later stage in the journey.
  • Charge: Serves to charge the battery via the combustion engine while on the move, to enable all-electric driving in an environmental zone at a later stage in the journey, for example.
Intelligent lightweight design for slimline results
Another key factor behind the vehicle's economic efficiency is the weight-shedding programme that the GLC has undergone. Despite markedly increased exterior dimensions, a longer wheelbase and more equipment, the vehicle's gross weight has dropped by 80 kilograms. The main contributory factor here is the totally new aluminium hybrid body, which introduces innovative lightweight design into volume production. The GLC's structure is based on an intelligent mix of materials spanning aluminium, high to ultra-high-strength steels and robust plastic. Including the doors and door hinges weighing a total of 476.5 kilograms, the bodyshell is around 50 kilograms lighter than the more compact preceding model – and remarkably, this is accompanied by increased rigidity for outstanding handling, optimised noise and vibration comfort and even better crash safety.
The following aluminium components are used, accounting for 13 percent of the weight:
  • front wing, bonnet and roof panelling
  • Front: front end (extruded aluminium section), crash boxes, frames for fitting headlamps, cooling system and bonnet closing system
  • shock absorber strut consoles (die-cast aluminium) to house the front struts
  • rear area with shock absorber strut consoles, cross-members and longitudinal members (die-cast aluminium)
  • door hinges
  • 4x4 integral support for front axle and steering, rear axle carrier
  • Suspension: four-link front suspension with spring link, strut rod, upper wishbone and steering knuckle (forged aluminium), five-link rear axle and wheel carrier (forged aluminium). This lowers the weight of the rear axle by 5 kilograms, while also improving its stability.
The steel grades used are distributed as follows:
  • 59 percent by weight of high-strength and very high-strength steel
  • 17 percent of ultra-high-strength steel
  • 11 percent of even more resistant, hot-formed steel
Weight-shedding measures also apply to the air suspension elements of the AIR BODY CONTROL system, which consist of glass-fibre-reinforced plastic. The aluminium and plastic components of the chassis and suspension not only reduce the weight but also enhance ride comfort as a result of the attendant reduction in unsprung masses.
Other weight advantages result from the 4MATIC all-wheel drive powertrain with the nine-speed automatic 9G-TRONIC featuring a magnesium housing. Weight savings of around 12 kilograms are attained here. Highly robust body components made of plastic are also used. The front major assemblies compartment partition is one such component.
Streamlined transition
The design transition has also bestowed superlative aerodynamics on the new GLC, which sets a clear benchmark in this SUV class with a Cd value of 0.31 (GLK 0.34) and total aerodynamic drag of 0.794 (GLK 0.87). Apart from the vehicle's substantially more aerodynamically efficient basic shape, this exceptional aerodynamic performance also results from a host of solutions relating to points of detail:
  • Cooling air controlled according to installed engine variant, with ring-type shutter
  • Improved sealing of the radiator section and flow properties to make efficient use of the available cooling air
  • Streamlined design of the front and rear aprons
  • Sealed headlamp surrounds
  • Three-dimensional front wheel spoilers with patented slotted wheel arch linings for optimised air flow around the wheels
  • Aeroacoustic and aerodynamic design of the A-pillar
  • Extended roof spoiler with optimised flow properties and joint seals
  • Aerodynamically optimised underbody with extensive engine compartment and underbody panelling
  • Aerodynamically optimised wheels and tyres

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