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Mercedes-Benz C-Class 300 e AMG Line

Mercedes-Benz C-Class 300 e AMG Line

Key stats

  • Model/Engine size: Mercedes-Benz C-Class 300 e AMG Line
  • Fuel: Petrol Plug-in Hybrid
  • Range (WLTP): 565 mpg *see text
Mercedes-Benz C-Class 300 e AMG Line


The rivalry between the BMW 3 Series and the Mercedes C-Class is one of the longest in the car industry. If you are interested in how a car drives it has always been pretty clear cut, you buy the BMW. However with the latest C-Class closer than ever in the driving stakes the decision is a lot harder than it used to be.

The latest battle ground is the high tech world of plug-in hybrids. The Mercedes system uses a slim electric motor integrated into the 9 speed automatic gearbox. An additional clutch allows the electric motor to power the car independently or in combination with a 2 litre petrol unit. A useful 25.4 kWh (net) lithium-ion battery provides enough juice for up to 71 miles of pure electric running with the system reverting to hybrid after this point. In order to support the bigger battery the ‘e’ gets an 11 kW on-board charger rather than the plug-in hybrid norm of just 3 kW. That allows a full recharge in 2 hours, or 3 hours from a domestic 7.4 kW wallbox. However the Mercedes can also utilise Rapid CCS chargers with a maximum power of 55 kW which brings a charge down to 20 minutes.

The combined system provides a mighty 406 lb ft of torque which fires the C Class to 62 mph in just over 6 seconds. In pure electric mode performance remains strong with a usefully high top speed of 87 mph allowing you to run in EV mode anywhere.

To help you to maximise electric running the system can use a sat nav route to decide when to recharge, save or use the battery. It can also make suggestions to the driver through the haptic accelerator pedal which provides pulse points to suggest lifting off to coast up to a car in front, and a resistance point to tell you when further application of the accelerator will start the petrol engine.

If you want more control you can select E-mode, E-save, or Charge manually in addition to all the usual drive configurations of gear change speed, suspension, accelerator and steering settings. The system is also capable of ‘sailing’ where the petrol engine is de-clutched to allow the car to roll at speeds up to 81 mph. By using the radar system the C-Class can decide when sailing or regenerative braking is the best option and also when to trigger the haptic accelerator to maximise the effect.

The plug-in C-Class is a technical tour de force, but is it enough to dethrone the 330e? Well in the driving stakes the BMW still edges it, but the Mercedes has the upper hand when it comes to its pure electric range.


Estimated real world range: 30 – 71 miles (electric)
Official electric range: 71 miles
Electricity consumption: 179 Wh/km
Battery pack: 25.4 kWh (usable) lithium-ion
Recharge time: 7 kW wallbox 3 hours (10-100%); 11 kW approx 2 hours; Rapid CCS 50 kW approx 20 mins

Please note that CO2 emissions quoted for electric cars are not directly comparable to diesel and petrol cars. This is because CO2 emissions quoted are calculated by Green Car Guide and include the emissions created at the power station turning fuel (e.g. gas etc) into electricity and in transmitting and distributing the electricity to an end user. They do not include the actual production of the fuel (e.g. gas extraction and refinery emissions). Petrol and diesel emissions are supplied by car manufacturers and are based solely on the fuel burnt in the engine (tailpipe emissions) and do not include the production of the fuel or distribution to a fuel station. In practice this means that electric car emissions are over-estimated relative to petrol and diesel. For instance if an electric car, a petrol car, and a diesel car are all reported to emit 100 g/km CO2, the electric car actually has lower emissions.

Specifications Mercedes-Benz C-Class 300 e AMG Line

  • Fuel economy, extra urban: N/A
  • Fuel economy, urban: N/A
  • CO2 emissions: Officially 12 g/km. Average UK grid electricity 38 g/km (71 mile range); (30 mile range) 90 g/km
  • VED: First year £0, then £520 a year for five years
  • Weight: 2,080 Kg
  • BIK Company Car Tax (2023/24): 5%
  • Price: £52,025
  • Insurance group: 43
  • Power: 274 @ 6,100 rpm (petrol) 127 (electric) 308 (system) bhp
  • Max speed: 152 mph, 87 mph (electric) mph
  • 0-62mph: 6.1 seconds
  • Torque: 236 lb ft @ 2,000 – 4,000 rpm (petrol) 325 lb ft (electric) 406 lb ft (system)