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Citroen C5 X vs Mercedes S-Class comparison

Compare performance (145 HP vs 635 HP), boot space and price (39,400 £ vs 104,000 £ ) at a glance. Find out which car is the better choice for you – Citroen C5 X or Mercedes S-Class?

Citroen C5 X vs Mercedes S-Class: Key differences

Citroen C5 X

4.2 (4 Reviews)
rate
  • substantially cheaper
  • clearly lighter
  • marginally more trunk space
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Mercedes S-Class

  • substantially more power
  • considerably more efficient
  • significantly quicker 0–100 km/h
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All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.

By Achim Sedelmaier

Here’s where it gets real: The technical differences in detail

C5 X

Costs and Efficiency:

Price and efficiency are key factors when choosing a car – and this is often where the real differences emerge.

Citroen C5 X is substantially cheaper – starting at 39,400 £ , while the Mercedes S-Class costs 104,000 £ . That’s a price difference of around 64,591 £.

Fuel consumption also shows a difference: the Mercedes S-Class uses 2.2 L/100km and is considerably more efficient than the Citroen C5 X with 5.1 L/100km. The difference is about 2.9 L/100km.

S-Class

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Mercedes S-Class offers substantially more power – delivering 635 HP compared to 145 HP. That’s roughly 490 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes S-Class is significantly quicker – completing the sprint in 4 s, while the Citroen C5 X takes 10.4 s. That’s about 6.4 s quicker.

There’s also a difference in torque: the Mercedes S-Class delivers substantially more torque with 850 Nm compared to 230 Nm. That’s about 620 Nm more.

C5 X

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Both vehicles offer seating for 5 people.

In terms of curb weight, Citroen C5 X is clearly lighter – 1,591 kg compared to 2,165 kg. The difference is around 574 kg.

Looking at boot space, the Citroen C5 X offers marginally more boot space – 545 L compared to 530 L. That’s a difference of about 15 L.

When it comes to payload, the Mercedes S-Class carries clearly more – 660 kg compared to 399 kg. That’s a difference of about 261 kg.

Who wins the race in the data check?

The Mercedes S-Class is far ahead overall in the objective data comparison.
This result only shows which model scores more points on paper – not which of the two cars feels right for you.

from £104,000
S-Class

Mercedes S-Class

  • Engine Type Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission Automatic
  • Drive Type All-Wheel Drive, Rear-Wheel Drive
  • Power HP 336 - 635 HP
  • Consumption L/100km 2.2 - 11 L/100km
  • Electric Range 98 - 118 km
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Frequently compared as well

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Citroen C5 X
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Citroen C5 X
Mercedes S-Class

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Citroen C5 X

Citroen C5 X combines the poise of a sleek crossover with the practicality of an estate, delivering a calm, comfortable cabin that feels designed for long, relaxed journeys rather than racetrack drama. If you want a car that pampers passengers, swallows everyday luggage and glides over rough roads like a diplomat dodging awkward questions, this is your kind of transport.

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C5X_PHEV_UK_2022_EXT (21)
C5X_PHEV_2022_EXT (12)
C5X_PHEV_2022_EXT (23)
C5X_2022_INT (20)

Reviews Citroen C5 X

4.2 (4 Reviews)
rate
Flament
13 Jun 2026, 13:54:21

Value for money / comfort, space unbeatable — C5 X Shine, 4‑cylinder petrol with options... heated, electrically adjustable programmable seat, 2 years, 12,000 km, €23,000

Efficiency / Consumption & Range
Comfort & Interior
Driving Fun / Performance
Safety
Practicality / Trunk & Everyday Use
Value for Money

Mercedes S-Class

The Mercedes S-Class wraps peerless comfort, whisper-quiet luxury and subtle tech wizardry into a chauffeur-ready package that still knows how to engage the driver. It’s the car for buyers who want to arrive relaxed, be taken seriously and occasionally enjoy a grin when the road reminds them this limousine can dance.

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21C0428_004
21C0613_021
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21C0613_042
21C0613_043

Reviews Mercedes S-Class

No reviews yet. Share your experience and help others decide.

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Mercedes S-Class

Costs and Consumption
Price
39,400 £
Price
104,000 - 201,400 £
Consumption L/100km
5.1 L/100km
Consumption L/100km
2.2 - 11 L/100km
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
98 - 118 km
Battery Capacity
-
Battery Capacity
-
co2
116 g/km
co2
50 - 252 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Estate
Body Type
Sedan
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,591 kg
Curb weight
2,165 - 2,650 kg
Trunk capacity
545 L
Trunk capacity
345 - 530 L
Length
-
Length
-
Width
1,815 mm
Width
1,921 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
399 kg
Payload
420 - 660 kg

Engine and Performance
Engine Type
Petrol MHEV
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Power HP
145 HP
Power HP
336 - 635 HP
Acceleration 0-100km/h
10.4 s
Acceleration 0-100km/h
4 - 5.7 s
Max Speed
-
Max Speed
-
Torque
230 Nm
Torque
560 - 850 Nm
Number of Cylinders
3
Number of Cylinders
6 - 8
Power kW
107 kW
Power kW
247 - 467 kW
Engine capacity
1,199 cm3
Engine capacity
2,989 - 3,982 cm3

General
Model Year
2025
Model Year
2026
CO2 Efficiency Class
D
CO2 Efficiency Class
G, B, F
Brand
Citroen
Brand
Mercedes-Benz
What drive types are available for the Citroen C5 X?

Available configurations include Front-Wheel Drive.

DriveDuel uses data analysis and artificial intelligence to evaluate vehicle data and create content. Content is regularly reviewed and improved. The displayed prices are estimates based on German list prices, adjusted to the respective country’s VAT. Country-specific registration taxes are not included. This information is not legally binding.