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Mercedes C-Class Saloon vs smart #3 comparison

Compare performance (680 HP vs 272 HP), boot space and price (41,300 £ vs 42,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes C-Class Saloon or smart #3?

Mercedes C-Class Saloon vs smart #3: Key differences

Mercedes C-Class Saloon

  • very slightly cheaper
  • significantly more power
  • considerably quicker 0–100 km/h
  • barely lighter
  • moderately more trunk space
details

smart #3

5 (1 Reviews)
rate
  • clearly more electric range
details

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

C-Class Saloon

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Mercedes C-Class Saloon is very slightly cheaper – starting at 41,300 £ , while the smart #3 costs 42,000 £ . That’s a price difference of around 666 £.

As for electric range, the smart #3 offers clearly more range – reaching up to 455 km, about 444 km more than the Mercedes C-Class Saloon.

#3

Engine and Performance:

Under the bonnet, it becomes clear which model is tuned for sportiness and which one takes the lead when you hit the accelerator.

When it comes to engine power, the Mercedes C-Class Saloon offers significantly more power – delivering 680 HP compared to 272 HP. That’s roughly 408 HP more horsepower.

When accelerating from 0 to 100 km/h, the Mercedes C-Class Saloon is considerably quicker – completing the sprint in 3.4 s, while the smart #3 takes 5.8 s. That’s about 2.4 s quicker.

There’s also a difference in torque: the Mercedes C-Class Saloon delivers clearly more torque with 1,020 Nm compared to 384 Nm. That’s about 636 Nm more.

C-Class Saloon

Space and Everyday Use:

Cabin size, boot volume and payload all play a role in everyday practicality. Here, comfort and flexibility make the difference.

Both vehicles offer seating for 5 people.

In terms of curb weight, Mercedes C-Class Saloon is barely lighter – 1,695 kg compared to 1,810 kg. The difference is around 115 kg.

Looking at boot space, the Mercedes C-Class Saloon offers moderately more boot space – 455 L compared to 370 L. That’s a difference of about 85 L.

When it comes to payload, the Mercedes C-Class Saloon carries clearly more – 570 kg compared to 450 kg. That’s a difference of about 120 kg.

Who wins the race in the data check?

The Mercedes C-Class Saloon is clearly superior 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 £41,300
C-Class Saloon

Mercedes C-Class Saloon

  • Engine Type Petrol MHEV, Diesel MHEV, Plugin Hybrid
  • Transmission Automatic
  • Drive Type Rear-Wheel Drive, All-Wheel Drive
  • Power HP 183 - 680 HP
  • Consumption L/100km 4.5 - 9 L/100km
  • Electric Range 11 km
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Mercedes C-Class Saloon
smart #3

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis

Mercedes C-Class Saloon

The Mercedes C‑Class is the compact executive that dresses like it owns the boulevard, with an interior that blends modern elegance and plush comfort to make everyday driving feel unexpectedly special. On the road it pairs poise with a hint of cheeky agility, rewarding drivers who want refinement without forfeiting a touch of fun — and yes, it still looks great in the driveway.

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Reviews Mercedes C-Class Saloon

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

smart #3

The Smart #3 turns the brand's cheeky city-car attitude into a grown-up compact SUV, pairing sleek styling with a surprisingly roomy, well-made interior. It's a brilliant pick for buyers who want electric ease without dullness — practical enough for daily life, but still lively enough to make parking and grocery runs feel a little fun.

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smart-hashtag3-brabus-photon-orange-exterior-mallorca1
smart-hashtag3-brabus-photon-orange-exterior-mallorca13
smart-hashtag3-brabus-photon-orange-exterior-mallorca21
smart-hashtag3-brabus-photon-orange-interior-mallorca10
smart-hashtag3-brabus-photon-orange-interior-mallorca3
smart-hashtag3-premium-ceramic-cream-interior-mallorca7

Reviews smart #3

5 (1 Reviews)
rate
Ronny
16 Oct 2025, 13:10:59

Handsome design, packed with advanced driver‑assist technology and stellar performance — all at an attractive price. Highly recommended, this car!

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Mercedes C-Class Saloon
smart #3

Costs and Consumption
Price
41,300 - 103,400 £
Price
42,000 £
Consumption L/100km
4.5 - 9 L/100km
Consumption L/100km
-
Consumption kWh/100km
-
Consumption kWh/100km
16.3 kWh/100km
Electric Range
11 km
Electric Range
455 km
Battery Capacity
-
Battery Capacity
-
co2
119 - 205 g/km
co2
0 g/km
Fuel tank capacity
-
Fuel tank capacity
-

Dimensions and Body
Body Type
Sedan
Body Type
SUV
Seats
5
Seats
5
Doors
-
Doors
-
Curb weight
1,695 - 2,165 kg
Curb weight
1,810 kg
Trunk capacity
280 - 455 L
Trunk capacity
370 L
Length
-
Length
-
Width
1,820 - 1,900 mm
Width
1,844 mm
Height
-
Height
-
Max trunk capacity
-
Max trunk capacity
-
Payload
485 - 570 kg
Payload
450 kg

Engine and Performance
Engine Type
Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Electric
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatic Gearbox
Transmission Detail
Reduction Gearbox
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
183 - 680 HP
Power HP
272 HP
Acceleration 0-100km/h
3.4 - 8.6 s
Acceleration 0-100km/h
5.8 s
Max Speed
-
Max Speed
-
Torque
250 - 1,020 Nm
Torque
384 Nm
Number of Cylinders
4
Number of Cylinders
-
Power kW
135 - 500 kW
Power kW
200 kW
Engine capacity
1,496 - 1,999 cm3
Engine capacity
-

General
Model Year
2,024 - 2,025
Model Year
2025
CO2 Efficiency Class
E, D, G
CO2 Efficiency Class
A
Brand
Mercedes-Benz
Brand
smart
What drivetrain options does the Mercedes C-Class Saloon have?

The Mercedes C-Class Saloon is available as Rear-Wheel Drive or All-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.