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Mercedes-BenzGLC Plug-in Hybrid (2022-)

Medium/Large SUV
Plug-in hybrid (PHEV)
Available new

£56,470Typical price

Test score

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The plug-in hybrid Mercedes-Benz GLC is a mid-size SUV. Launched in 2022, it offers 340hp of power and the potential for excellent fuel economy. How does it perform against PHEV SUVs like the Audi Q5, BMW X3 and Volvo XC60? Find out in our full Mercedes-Benz GLC Plug-In Hybrid 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's plug-in hybrid cars?
How comfortable and spacious is it?
How economical is it to run?
How safe is it?
Is there anything I should look out for?
Should I buy it?

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

Feb 2025First reviewed by Which?
Jun 2022Released

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

How we test cars

20 May 2025

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.

Safety kit

How we test safety kit

We factor in the safety equipment that’s factory-fitted or optional, along with how well the car protects its occupants and pedestrians in the event of an accident. We also test how easy it is to fit a variety of child car seats.

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	Medium/Large SUV
Luxury	Yes
Convertible	No
Availability	Available new
New price	£56,470 - £73,220
Fuel type	Plug-in hybrid (PHEV)
Tested fuel efficiency	856mpg
Length	4,716mm
Width (excluding wing mirrors)	1,890mm
Width (including wing mirrors)	2,080mm
Height	1,647mm
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	11.1 m
On sale date	30 September 2022
Lowest pence-per-mile cost	£11.46

Latest tested engine
Engine and trim name	300de AMG Line Premium Plus
Fuel type	Plug-in-Diesel-Hybrid
Capacity and power	2-litre (333hp)
Transmission	9-speed automatic
Driven wheels	Four-wheel-drive (4WD)
Fuel tank capacity	62 litres
Tested fuel economy: City / Out of town / Motorway (mpg)
Tested fuel efficiency (mi/kWh)
Tested fuel economy: Combined (mpg)
Cost per mile	11.46p per mile
Cost of filling tank	£87
Monthly fuel cost
Annual fuel cost
NOx level	Extremely Low (trace)
CO level	Very low
CO2 at tailpipe/tank-to-wheel (TTW) (g/km)	9
Tested electric-only range (miles)
Official fuel economy: WLTP	565
Braked tow load (KG)	2000kg
Unbraked tow load (KG)	750kg
Engine test date	18 December 2024
Test programme	2017

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Mercedes-BenzGLC Plug-in Hybrid (2022-)

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