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BMW X5 M50d F15 vs Mercedes S 450 d 4MATIC Saloon, long version W223: which is cheaper to run?

What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.

large SUV · 2018 vs 2026 · 15,000 km/an · Mixed · Diesel 2.38 €/L · 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

Result · yearly energy cost

ABMW X5 M50d F15

2,627 €per year

7,4 L/100 km weighted · 17.51 € per 100 km · 1 105 L per year

Gap57 € per yearin favour of the S 450 d 4MATIC Saloon, long version (−2 %)≈ 24 L diesel
BMercedes S 450 d 4MATIC Saloon, long version W223

2,570 €per year

7,2 L/100 km weighted · 17.13 € per 100 km · 1 082 L per year

The verdict changes with your usage
ProfileSplitAA · X5BB · SGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway2,782 €2,871 €89 € · X5
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,627 €2,570 €Nearly level
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,509 €2,336 €173 € · S

Cumulative saving for the S 450 d 4MATIC Saloon, long version

1 year
57 €
3 years
171 €
5 years
284 €
10 years
568 €

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

What produces these figures

WLTP combined
7.2 L/100 km · 6.9 L/100 km
Powertrain
Combustion · Mild hybrid 48 V
Power
400 ch · 367 ch
Kerb weight
2,275 kg · 2,255 kg

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X5 M50d vs Q7 SUV

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MercedesVSBMW

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gap 742 €/year

Frequently asked questions

On a 100 km mixed trip, the BMW X5 M50d and Mercedes S 450 d 4MATIC Saloon, long version have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The Mercedes S 450 d 4MATIC Saloon, long version is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.