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Mercedes-BenzC-class (2021-)

Available new
Large
Petrol/Diesel/Mild hybrid

£43,180Typical price

Test score

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The Mercedes-Benz C-Class is a large saloon that pretty much defines the word ‘premium’. The fifth-generation model, launched in 2021, uses hybrid power throughout the range. But does the Mercedes C-Class saloon beat upmarket saloon rivals such as the Audi A4, BMW 3 Series and Volvo S60? Find out in our full Mercedes-Benz C-Class review.

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What's included?

What is it?
What’s it great at?
What’s it like to drive?
How reliable are Mercedes-Benz cars?
How comfortable is it?
How economical is it to run?
How safe is it?
Is there anything I should look out for?
Should I buy it?

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KEY TEST RESULTS
Comfort and practicality
Brand reliability 0-4 years

Jan 2023Last checked by Which?
Jul 2022First reviewed by Which?
Jul 2021Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test cars

17 May 2024

Ease of driving

Overall
Visibility
Smoothness of power delivery
Driving stability
Cabin layout

How we test ease of driving

To find out how easy a car is to drive, we assess cars across a number of areas from visibility and handling to the layout of the cabin and how smoothly the engine delivers its power.

Performance

Overall
In-gear acceleration
Brakes

How we test performance

We test braking distances and whether the effectivess of the brakes fade with repeat use. Performanc is based on in-gear acceleration.

Comfort and practicality

Overall
Entry and exit
Seat comfort
Ride quality
Quietness
Seat space
Boot space (large cars, SUVs and MPVs)

How we test comfort and practicality

Comfort and practicality includes how easy it is, or not, to get in and out of the car and the maximum height of occupants. We also measure road, wind and engine noise and assess how well the car deals with bumps from large potholes to jittery surfaces like cobble stones.

Euro NCAP

How we test euro ncap

Any car that receives a rating of three stars or less from Euro NCAP is made a Don't Buy. If a car has been available for more than four years and has not been tested by Euro NCAP, it cannot be a Best Buy.

Which? safety

Brand reliability 0-4 years

Overall
Electric car reliability
Plug-in hybrid reliability
Petrol reliability
Diesel reliability

How we test brand reliability 0-4 years

Our reliability ratings are based on the feedback from tens of thousands of UK motorists, as collected in our annual Which? car survey. We divide all reliability feedback into three age groups: cars aged up to four years, five to nine years, and 10 to 15 years.

Brand reliability 5-9 years

Overall
Diesel reliability

Brand reliability 10-15 years

Overall
Petrol reliability
Diesel reliability

General
Class	Large
Luxury	No
Convertible	No
Availability	Available new
New price	£43,180 - £55,340
Fuel type	Petrol/Diesel/Mild hybrid
Tested fuel efficiency	37.7mpg
Length	4,751mm
Width (excluding wing mirrors)	1,820mm
Width (including wing mirrors)	2,040mm
Height	1,438mm
Driver max height
Second row passenger max height
Boot space with seats up
Boot space with seats down
Number of seats	5
Folding rear seats	Yes
Isofix attachments	Yes
Turning circle	10.6 m
On sale date	28 July 2021
Lowest pence per mile cost	£18.10

Latest tested engine
Engine name	C 200 Avantgarde 9G-TRONIC
Fuel type	Mild-Petrol-Hybrid
Capacity and power	1.5-litre (224hp)
Transmission	9-speed automatic
Driven wheels	Rear-wheel-drive (RWD)
Fuel tank capacity	50 litres
Tested fuel economy: City / Out of town / Motorway (mpg)
Tested fuel economy: Combined (mpg)
Cost per mile	18.1p per mile
Cost of filling tank	£75
Monthly fuel cost
Annual fuel cost
NOx level	Extremely Low (trace)
CO level	Low
CO2 at tailpipe/tank-to-wheel (TTW) (g/km)	179
Well-to-wheel (WTW) CO2 (g/km)	206
Official fuel economy: WLTP	41.5 to 44.1
Official Euro emission level	Euro 6d
Braked tow load (KG)	1800kg
Unbraked tow load (KG)	750kg
Engine test date	14 October 2021
Test programme	2017

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Mercedes-BenzC-class (2021-)

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