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M340iHybridvsCPHEV
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost

BMW M340i xDrive G20 vs Mercedes C 400 e 4MATIC Limousine W206: which is cheaper to run?

What each kilometre costs, depending on your driving profile, how you charge and the share of the trip driven on electricity or fuel.

saloon · 2020 vs 2024 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Home 0.20 €/kWh · Methodology
Annual mileage
15,000 km
5,000 km50,000 km
Driving mix

30 % City · 50 % Road · 20 % Motorway

Fuel price
Petrol 95 2.17 €/L · Diesel 2.38 €/Lprix-carburants.gouv.fr — moyenne nationale du 05/10/2026 ; EDF Tarif Bleu Base au 01/08/2026 ; DC autoroute : moyenne des réseaux sans abonnement
Charging type

Result · yearly energy cost

ABMW M340i xDrive G20

2,402 €per year

7,4 L/100 km weighted · 16.01 € per 100 km · 1 107 L per year

Gap1,507 € per yearin favour of the C 400 e 4MATIC Limousine (−63 %)≈ 694 L petrol 95
BMercedes C 400 e 4MATIC Limousine W206

896 €per year

23,6 kWh/100 km weighted · 5.97 € per 100 km · 1 223 L per year

The verdict changes with your usage
ProfileSplitAA · M340iBB · CGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway2,716 €896 €1,821 € · C
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,402 €896 €1,507 € · C
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,165 €896 €1,269 € · C

Cumulative saving for the C 400 e 4MATIC Limousine

1 year
1,507 €
3 years
4,520 €
5 years
7,533 €
10 years
15,065 €

Energy only. Excludes purchase, insurance, servicing, depreciation.

What produces these figures

WLTP combined
7.0 L/100 km · 22.7 kWh/100 km
Powertrain
Mild hybrid 48 V · Plug-in hybrid
Power
382 ch · 381 ch
Kerb weight
1,823 kg · 2,130 kg

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gap 1 300 €/year
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gap 2 434 €/year
BMWVSAudi

M340i xDrive vs A5 Sedan e-hybrid quattro 270 kW

MercedesVSAudi

C 400 e 4MATIC Limousine vs A5 Avant e-hybrid quattro 270 kW

gap 708 €/year

Frequently asked questions

On a 100 km mixed trip, the Mercedes C 400 e 4MATIC Limousine is about 65% cheaper than the BMW M340i xDrive with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The declared range of the Mercedes C 400 e 4MATIC Limousine is 94 km (WLTP/EPA). In real-world conditions, expect 10-20% less.

The Mercedes C 400 e 4MATIC Limousine is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.

  • SpecsM340i · C