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Mercedes GLC300 (petrol) • 251 cars with Valuation

Market overview: Petrol Mercedes GLC300 (October-2026): There are currently 251 used petrol Mercedes GLC300 cars for sale. Prices range from £21,320 to £61,721, with a median price of £37,127. AutoUncle has identified 57 cars as being offered below market price. The typical selling time for a petrol Mercedes GLC300 is approximately 20 days, and 56.5% of the listings have recently been reduced in price (Source: AutoUncle market data, October-2026).

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Used Mercedes GLC300 AMG line 258 HP (189 kW) 2026 Red SUV

(2026) Mercedes GLC300 AMG line 258 HP

Super price

You save £5,610

RM20 3WJ Thurrock, Essex

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2023 Black SUV

(2023) Mercedes GLC300 AMG line 258 HP

Fair price

Estimated price £32,586

G32 9QA Glasgow City, Glasgow

171 g CO2/km comb. - 258 HP (189 kW) - 7.4 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2023 Black SUV

(2023) Mercedes GLC300 AMG line 258 HP

Fair price

Estimated price £36,952

G46 6AA Giffnock, Renfrewshire

171 g CO2/km comb. - 258 HP (189 kW) - 7.4 Mpg

Carwow

Used Mercedes GLC300 AMG line 272 HP (200 kW) 2023 Silver Coupe

(2023) Mercedes GLC300 AMG line 272 HP

Fair price

Estimated price £33,248

S80 2QD Nottinghamshire, Nottinghamshire

199 g CO2/km comb. - 272 HP (200 kW) - 8.5 Mpg

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-3%

1 / 4

Used (2020) Mercedes GLC300 258 HP | Super price

4Matic Sport 5dr 9G-Tronic

Sep 2020
35,204 miles
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 166 g CO2/km comb.
35.3 mpg
Details

Super price

£23,209

£23,989

Nottingham, Nottinghamshire

Availability verified

-2%

1 / 4

Used (2023) Mercedes GLC300 AMG Line Premium 258 HP | Good price

GLC 2023 AMG Line 4Matic 9G-Tr

2023
7,012 miles
Trim level: AMG Line Premium
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 171 g CO2/km comb.
7.4 mpg
Details

Good price

£37,200

£38,000

CM1 3BH Essex, Essex

Availability verified

-6%

1 / 4

Used (2026) Mercedes GLC300 AMG line 258 HP | Super price

GLC 2026 AMG Line 4Matic 9G-Tr

2026
4,662 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Super price

£41,480

£44,267

RG1 8EQ Berkshire, Berkshire

Availability verified

-1%

1 / 4

Used (2025) Mercedes GLC300 AMG line 258 HP | Good price

GLC 2025 AMG Line 4Matic 9G-Tr

2025
22,395 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
8.3 mpg
Details

Good price

£37,893

£38,444

HP9 1QL Buckinghamshire, Buckinghamshire

Availability verified

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Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2023 Black SUV

(2023) Mercedes GLC300 AMG line 258 HP

Fair price

Estimated price £30,617

SL1 5PR Berkshire, Berkshire

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG Line Premium 258 HP (189 kW) 2023 Blue SUV

(2023) Mercedes GLC300 AMG Line Premium 258 HP

Good price

You save £2,500

CM1 3BH Essex, Essex

171 g CO2/km comb. - 258 HP (189 kW) - 7.4 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2025 White SUV

(2025) Mercedes GLC300 AMG line 258 HP

Good price

You save £3,005

IP3 9SJ Suffolk, Suffolk

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2023 Silver SUV

(2023) Mercedes GLC300 AMG line 258 HP

Good price

You save £1,705

S80 2QD Nottinghamshire, Nottinghamshire

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

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Used (2025) Mercedes GLC300 AMG line 258 HP | Good price

GLC 2025 AMG Line 4Matic 9G-Tr

2025
17,733 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Good price

£38,426

£39,044

SL1 5PR Berkshire, Berkshire

Availability verified

-2%

1 / 4

Used (2025) Mercedes GLC300 AMG line 258 HP | Good price

GLC 2025 AMG Line 4Matic 9G-Tr

2025
26,455 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Good price

£37,176

£38,039

HP19 8BL Buckinghamshire, Buckinghamshire

Availability verified

-1%

1 / 4

Used (2025) Mercedes GLC300 AMG line 258 HP | Good price

GLC 2025 AMG Line 4Matic 9G-Tr

2025
21,025 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Good price

£38,022

£38,623

RG12 9FR Berkshire, Berkshire

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1 / 4

Used (2022) Mercedes GLC300 AMG line 258 HP | Super price

GLC 2022 AMG Line 4Matic 9G-Tr

2022
30,915 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 191 g CO2/km comb.
8.3 mpg
Details

Super price

£26,222

£25,699

LN2 4JA Lincolnshire, Lincolnshire

Availability verified

-7%

1 / 4

Used (2023) Mercedes GLC300 AMG line 258 HP | Super price

GLC Coupe 2023 AMG Line 4Matic

2023
59,441 miles
Trim level: AMG line
2.0L Petrol
Coupe
Automatic
258 HP (189 kW)
CO2 emissions: 193 g CO2/km comb.
8.5 mpg
Details

Super price

£26,390

£28,470

WF2 7UA West Yorkshire, West Yorkshire

Availability verified

-4%

1 / 4

Used (2020) Mercedes GLC300 AMG line 258 HP | Good price

GLC 4Matic AMG Line 5dr 9G-Tro

2020
46,223 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 191 g CO2/km comb.
8.3 mpg
Details

Good price

£21,299

£22,399

M417TB Urmston, Manchester

Availability verified

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Used Mercedes GLC300 AMG Line Premium Plus 258 HP (189 kW) 2026 Estate

(2026) Mercedes GLC300 AMG Line Premium Plus 258 HP

Fair price

Estimated price £41,294

TA1 2EJ Somerset, Somerset

167 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2023 Grey SUV

(2023) Mercedes GLC300 AMG line 258 HP

Fair price

SS6 7FY Essex, Essex

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2025 Black SUV

(2025) Mercedes GLC300 AMG line 258 HP

Good price

You save £1,824

HP19 8BL Buckinghamshire, Buckinghamshire

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2026 Grey SUV

(2026) Mercedes GLC300 AMG line 258 HP

Super price

You save £3,820

RG1 8EQ Berkshire, Berkshire

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

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Used (2026) Mercedes GLC300 AMG line 258 HP | Super price

GLC 2026 AMG Line 4Matic 9G-Tr

2026
2,841 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Super price

£41,480

£43,259

RG1 8EQ Berkshire, Berkshire

Availability verified

-3%

1 / 4

Used (2023) Mercedes GLC300 AMG line 258 HP | Good price

GLC Coupe 2023 AMG Line 4Matic

2023
54,686 miles
Trim level: AMG line
2.0L Petrol
Coupe
Automatic
258 HP (189 kW)
CO2 emissions: 193 g CO2/km comb.
8.5 mpg
Details

Good price

£27,990

£28,980

IP3 9SJ Suffolk, Suffolk

Availability verified

1 / 4

Used (2026) Mercedes GLC300 AMG line 258 HP | Super price

4Matic AMG Line 5dr 9G-Tronic

2026
3,313 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Super price

£39,890

£39,990

RM20 3WJ Thurrock, Essex

Availability verified

-8%

1 / 4

Used (2026) Mercedes GLC300 AMG line 258 HP | Super price

GLC 2026 AMG Line 4Matic 9G-Tr

2026
11,674 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Super price

£38,490

£42,090

IP3 9SJ Suffolk, Suffolk

Availability verified

1 / 4

Used (2025) Mercedes GLC300 AMG line 258 HP | Good price

GLC 2025 AMG Line 4Matic 9G-Tr

2025
4,000 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Good price

£39,995

£39,990

IP3 9SJ Suffolk, Suffolk

Availability verified

1 / 4

Used (2023) Mercedes GLC300 AMG line 258 HP | Super price

GLC Coupe 2023 AMG Line 4Matic

2023
44,880 miles
Trim level: AMG line
2.0L Petrol
Coupe
Automatic
258 HP (189 kW)
CO2 emissions: 193 g CO2/km comb.
8.5 mpg
Details

Super price

£28,595

£28,795

S80 2QD Nottinghamshire, Nottinghamshire

Availability verified

1 / 4

Used (2025) Mercedes GLC300 AMG line 258 HP | Good price

GLC 2025 AMG Line 4Matic 9G-Tr

2025
13,248 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 171 g CO2/km comb.
7.4 mpg
Details

Good price

£41,700

CM1 3BH Essex, Essex

Availability verified

-3%

1 / 4

Used (2021) Mercedes GLC300 AMG line 258 HP | Super price

GLC 2021 AMG Line 4Matic 9G-Tr

2021
51,030 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 191 g CO2/km comb.
8.3 mpg
Details

Super price

£21,995

£22,795

LE10 3DJ Leicestershire, Leicestershire

Availability verified

1 / 4

Used (2020) Mercedes GLC300 AMG line 258 HP | Super price

GLC 2020 AMG Line 4Matic 9G-Tr

2020
40,253 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 191 g CO2/km comb.
8.3 mpg
Details

Super price

£22,920

BB1 3NU Lancashire, Lancashire

Availability verified

-2%

1 / 3

Used (2023) Mercedes GLC300 AMG line 258 HP | Super price

GLC Coupe 2023 AMG Line 4Matic

2023
45,720 miles
Trim level: AMG line
2.0L Petrol
Coupe
Automatic
258 HP (189 kW)
CO2 emissions: 193 g CO2/km comb.
8.5 mpg
Details

Super price

£28,295

£28,995

LE10 3DJ Leicestershire, Leicestershire

Availability verified

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Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2025 Grey SUV

(2025) Mercedes GLC300 AMG line 258 HP

Good price

You save £1,878

RG12 9FR Berkshire, Berkshire

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2026 White SUV

(2026) Mercedes GLC300 AMG line 258 HP

Super price

You save £4,120

RG1 8EQ Berkshire, Berkshire

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2026 Red SUV

(2026) Mercedes GLC300 AMG line 258 HP

Fair price

You save £1,310

SS6 7FY Essex, Essex

168 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2025 Black SUV

(2025) Mercedes GLC300 AMG line 258 HP

Good price

You save £2,074

SL1 5PR Berkshire, Berkshire

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

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1 / 4

Used (2023) Mercedes GLC300 AMG line 258 HP | Super price

GLC Coupe 2023 AMG Line 4Matic

2023
42,700 miles
Trim level: AMG line
2.0L Petrol
Coupe
Automatic
258 HP (189 kW)
CO2 emissions: 193 g CO2/km comb.
8.5 mpg
Details

Super price

£28,995

£29,495

LE10 3DJ Leicestershire, Leicestershire

Availability verified

1 / 4

Used (2023) Mercedes GLC300 AMG line 258 HP | Good price

GLC 2023 AMG Line 4Matic 9G-Tr

2023
20,350 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Good price

£33,495

S80 2QD Nottinghamshire, Nottinghamshire

Availability verified

New

Used (2026) Mercedes GLC300 AMG line 258 HP | Good price

GLC 2027 AMG Line 4Matic AMG Line

2026
4,673 miles
Trim level: AMG line
3.0L Petrol
Estate
Automatic
258 HP (189 kW)
CO2 emissions: 165 g CO2/km comb.
7.3 mpg
Details

Good price

£40,490

WF27UA

Availability verified

-2%

1 / 1

Used (2023) Mercedes GLC300 AMG line | Super price

GLC 4Matic AMG Line 5dr 9G-Tro

2023
59,441 miles
Trim level: AMG line
2.0L Petrol
SUV
Automatic
Details

Super price

£26,390

£27,090

Dealer

London, London

1 / 1

Used (2025) Mercedes GLC300 AMG line | Super price

4Matic AMG Line 5dr 9G-Tronic

2025
21,025 miles
Trim level: AMG line
2.0L Petrol
Estate
Automatic
Details

Super price

£37,861

£38,077

Dealer

London, London

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Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2023 Black SUV

(2023) Mercedes GLC300 AMG line 258 HP

Fair price

CM2 5EF Springfield, Essex

171 g CO2/km comb. - 258 HP (189 kW) - 7.4 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2024 Red SUV

(2024) Mercedes GLC300 AMG line 258 HP

Fair price

KA8 0LL South Ayrshire, Ayrshire And Arran

171 g CO2/km comb. - 258 HP (189 kW) - 7.4 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2025 Black SUV

(2025) Mercedes GLC300 AMG line 258 HP

Fair price

KA8 0LL South Ayrshire, Ayrshire And Arran

171 g CO2/km comb. - 258 HP (189 kW) - 7.4 Mpg

Carwow

Used Mercedes GLC300 AMG line 258 HP (189 kW) 2026 White SUV

(2026) Mercedes GLC300 AMG line 258 HP

Super price

You save £6,310

IP3 9SJ Suffolk, Suffolk

165 g CO2/km comb. - 258 HP (189 kW) - 7.3 Mpg

Showing 1 - 25 of 248 results

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