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Mercedes S-Class vs smart #3 comparison
Compare performance (635 HP vs 272 HP), boot space and price (104,000 £ vs 42,000 £ ) at a glance. Find out which car is the better choice for you – Mercedes S-Class or smart #3?
Mercedes S-Class vs smart #3: Key differences
All details on performance, efficiency, range and trunk space can be found in the technical comparison below – including user reviews for both models.
S-Class
Costs and Efficiency:
When it comes to price and running costs, the biggest differences usually appear. This is often where you see which car fits your budget better in the long run.
smart #3 is clearly cheaper – starting at 42,000 £ , while the Mercedes S-Class costs 104,000 £ . That’s a price difference of around 62,028 £.
As for electric range, the smart #3 offers considerably more range – reaching up to 455 km, about 337 km more than the Mercedes S-Class.
#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 S-Class offers clearly more power – delivering 635 HP compared to 272 HP. That’s roughly 363 HP more horsepower.
When accelerating from 0 to 100 km/h, the Mercedes S-Class is considerably quicker – completing the sprint in 4 s, while the smart #3 takes 5.8 s. That’s about 1.8 s quicker.
There’s also a difference in torque: the Mercedes S-Class delivers considerably more torque with 850 Nm compared to 384 Nm. That’s about 466 Nm more.
S-Class
Space and Everyday Use:
Beyond pure performance, interior space and usability matter most in daily life. This is where you see which car is more practical and versatile.
Both vehicles offer seating for 5 people.
In terms of curb weight, smart #3 is slightly lighter – 1,810 kg compared to 2,165 kg. The difference is around 355 kg.
Looking at boot space, the Mercedes S-Class offers clearly more boot space – 530 L compared to 370 L. That’s a difference of about 160 L.
When it comes to payload, the Mercedes S-Class carries visibly more – 660 kg compared to 450 kg. That’s a difference of about 210 kg.
Who wins the race in the data check?
The smart #3 is decisively ahead 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.
£41,991
smart #3
Mercedes S-Class
smart #3
Costs and Consumption
View detailed analysis
View detailed analysis
Engine and Performance
View detailed analysis
View detailed analysis
Dimensions and Body
View detailed analysis
View detailed analysis
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.
details
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.
details
Mercedes S-Class
smart #3
Costs and Consumption |
|
|---|---|
|
Price
104,000 - 201,400 £
|
Price
42,000 £
|
|
Consumption L/100km
2.2 - 11 L/100km
|
Consumption L/100km
-
|
|
Consumption kWh/100km
-
|
Consumption kWh/100km
16.3 kWh/100km
|
|
Electric Range
98 - 118 km
|
Electric Range
455 km
|
|
Battery Capacity
-
|
Battery Capacity
-
|
|
co2
50 - 252 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
2,165 - 2,650 kg
|
Curb weight
1,810 kg
|
|
Trunk capacity
345 - 530 L
|
Trunk capacity
370 L
|
|
Length
-
|
Length
-
|
|
Width
1,921 mm
|
Width
1,844 mm
|
|
Height
-
|
Height
-
|
|
Max trunk capacity
-
|
Max trunk capacity
-
|
|
Payload
420 - 660 kg
|
Payload
450 kg
|
Engine and Performance |
|
|---|---|
|
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
|
Engine Type
Electric
|
|
Transmission
Automatic
|
Transmission
Automatic
|
|
Transmission Detail
Automatic Gearbox
|
Transmission Detail
Reduction Gearbox
|
|
Drive Type
All-Wheel Drive, Rear-Wheel Drive
|
Drive Type
Rear-Wheel Drive
|
|
Power HP
336 - 635 HP
|
Power HP
272 HP
|
|
Acceleration 0-100km/h
4 - 5.7 s
|
Acceleration 0-100km/h
5.8 s
|
|
Max Speed
-
|
Max Speed
-
|
|
Torque
560 - 850 Nm
|
Torque
384 Nm
|
|
Number of Cylinders
6 - 8
|
Number of Cylinders
-
|
|
Power kW
247 - 467 kW
|
Power kW
200 kW
|
|
Engine capacity
2,989 - 3,982 cm3
|
Engine capacity
-
|
General |
|
|---|---|
|
Model Year
2026
|
Model Year
2025
|
|
CO2 Efficiency Class
G, B, F
|
CO2 Efficiency Class
A
|
|
Brand
Mercedes-Benz
|
Brand
smart
|
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.