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(S-Line) Audi A6 used • 621 cars with price check

Market overview: Market price for Audi A6 (S-Line): The average price is £25,292, ranging from £5,995 to £57,079. Out of 621 cars for sale with the S-Line trim, AutoUncle has identified 100 deals currently listed below market value.

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Fair price

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-5%
1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

- Avant 40 TDI S Line 5dr

  • 2021
  • 67,860 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Super price

£17,799
£18,799
CW73AL, Cheshire
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-5%
1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

- Avant 40 TDI S Line 5dr

  • 2021
  • 65,150 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Super price

£18,199
£19,199
CW73AL, Cheshire
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1 / 4

Used (2021) Audi A6 S-Line 204 HP | Good price

- Avant 40 TDI S Line 5dr

  • 2021
  • 68,334 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Good price

£19,655
£19,773
OX162RS, Oxfordshire
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-4%
1 / 4

New (2025) Audi A6 S-Line 204 HP | Super price

-2.0 TFSI 204 S line 4dr Troni

  • 2025
  • 0 miles
  • Trim level: S-Line
  • 2.0L Petrol
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 7.1
  • CO2: 160 g CO2/km comb.
  • Details
autouncle-certified

Super price

£52,990
£55,440
NN55DH, Northamptonshire
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-6%
1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

-Avant 40 TDI S Line 5dr Troni

  • 2021
  • 39,940 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Super price

£20,799
£22,199
CW73AL, Cheshire
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-4%
1 / 4

Used (2021) Audi A6 S-Line 286 HP | Super price

-Avant 50 TDI Quattro S Line 5dr

  • 2021
  • 53,510 miles
  • Trim level: S-Line
  • 3.0L Diesel
  • Estate
  • Automatic
  • 286 HP (210 kW)
  • mpg: 6.9
  • CO2: 184 g CO2/km comb.
  • Details
autouncle-certified

Super price

£23,899
£24,999
CW73AL, Cheshire
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-4%
1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

-Avant 40 TDI S Line 5dr Troni

  • 2021
  • 45,590 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Super price

£20,499
£21,499
CW73AL, Cheshire
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New
1 / 1

Used (2021) Audi A6 S-Line 204 HP | Good price

- Avant 40 TDI S Line 5dr

  • 2021
  • 44,328 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Good price

£23,450
CV32 6AT Leamington Spa, Warwickshire
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-8%
1 / 3

Used (2021) Audi A6 S-Line 204 HP | Good price

-40 TDI S Line 4dr Tronic

  • 2021
  • 79,361 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.4
  • CO2: 142 g CO2/km comb.
  • Details
autouncle-certified

Good price

£16,648
£18,208
E65LU, London
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1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

- Avant 40 TDI S Line 5dr

  • 2021
  • 54,363 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Super price

£19,849
£19,999
EX28NT, Devon
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Featured deals

1 / 4

Used (2021) Audi A6 S-Line 204 HP | Good price

- Avant 40 TDI S Line 5dr

  • 2021
  • 65,149 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Good price

£19,350
£19,300
DE655FJ Hilton, Derbyshire
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-3%
1 / 3

Used (2021) Audi A6 S-Line 204 HP | Super price

-40 TDI S Line 4dr Tronic

  • 2021
  • 52,960 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.4
  • CO2: 142 g CO2/km comb.
  • Details
autouncle-certified

Super price

£18,250
£18,850
WD33RT Watford, Hertfordshire
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1 / 4

Used (2021) Audi A6 S-Line 204 HP | Good price

- 40 TDI S Line 4dr Tronic

  • 2021
  • 73,000 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.4
  • CO2: 142 g CO2/km comb.
  • Details
autouncle-certified

Good price

£17,250
£17,400
CF110BA, South Glamorgan
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-1%
1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

-Avant 40 TDI S Line 5dr Troni

  • 2021
  • 61,639 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Super price

£19,241
£19,490
TS247LD Hartlepool, Durham
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Used (2018) Audi A6 S-Line 190 HP | Good price

- Avant 2.0 TDI Ultra S Line 5dr

  • 2018
  • 75,581 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 190 HP (139 kW)
  • mpg: 4.5
  • CO2: 118 g CO2/km comb.
  • Details
autouncle-certified

Good price

£12,995
OL96HT, Manchester
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-20%
1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

-40 TDI S Line 4dr Tronic

  • 2021
  • 60,594 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.4
  • CO2: 142 g CO2/km comb.
  • Details
autouncle-certified

Super price

£18,000
£22,500
LE169PL, Leicestershire
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-4%
1 / 4

Used (2022) Audi A6 S-Line 204 HP | Good price

-40 TFSI S Line 4dr Tronic [Tech

  • 2022
  • 75,302 miles
  • Trim level: S-Line
  • 2.0L Petrol
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 7.1
  • CO2: 162 g CO2/km comb.
  • Details
autouncle-certified

Good price

£19,500
£20,500
LE169PL, Leicestershire
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-4%
1 / 4

Used (2021) Audi A6 S-Line 204 HP | Good price

- 40 TDI S Line 4dr Tronic

  • 2021
  • 23,613 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.4
  • CO2: 142 g CO2/km comb.
  • Details
autouncle-certified

Good price

£20,900
£21,900
LS270TS, West Yorkshire
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-3%
1 / 4

New (2025) Audi A6 S-Line 299 HP | Good price

-2.0 e-Hybrid Quattro 299 S line

  • 2025
  • 0 miles
  • Trim level: S-Line
  • 2.0L Hybrid
  • Sedan
  • Automatic
  • 299 HP (219 kW)
  • mpg: 2.3
  • CO2: 49 g CO2/km comb.
  • Details
autouncle-certified

Good price

£61,767
£64,000
LE32LD, Leicestershire
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-2%
1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

-Avant 40 TDI S Line 5dr Troni

  • 2021
  • 45,807 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Super price

£20,800
£21,300
WS111SL, Staffordshire
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Featured deals

New (2025) Audi A6 S-Line 204 HP | Good price

- Avant 2.0 TDI Quattro 204 S line

  • 2025
  • 0 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.3
  • CO2: 139 g CO2/km comb.
  • Details
autouncle-certified

Good price

£59,252
M169UA, Manchester
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New (2025) Audi A6 S-Line 204 HP | Good price

- Avant 2.0 TFSI 204 S line 5dr

  • 2025
  • 0 miles
  • Trim level: S-Line
  • 2.0L Petrol
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 7.2
  • CO2: 164 g CO2/km comb.
  • Details
autouncle-certified

Good price

£53,608
SG51RQ Hitchin, Hertfordshire
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1 / 4

Used (2021) Audi A6 S-Line 204 HP | Super price

- Avant 40 TDI S Line 5dr

  • 2021
  • 54,000 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Estate
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.7
  • CO2: 149 g CO2/km comb.
  • Details
autouncle-certified

Super price

£20,200
CM94LL, Essex
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-6%
1 / 4

New (2025) Audi A6 S-Line 204 HP | Super price

-2.0 TFSI 204 S line 4dr Troni

  • 2025
  • 0 miles
  • Trim level: S-Line
  • 2.0L Petrol
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 7.1
  • CO2: 160 g CO2/km comb.
  • Details
autouncle-certified

Super price

£49,860
£53,100
BH124QN, Dorset
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New (2025) Audi A6 S-Line 204 HP | Super price

- 2.0 TDI Quattro 204 S line 4dr

  • 2025
  • 0 miles
  • Trim level: S-Line
  • 2.0L Diesel
  • Sedan
  • Automatic
  • 204 HP (150 kW)
  • mpg: 5.2
  • CO2: 135 g CO2/km comb.
  • Details
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Super price

£56,905
BA228RT, Somerset
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Showing 1 - 25 of 595 results
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Good price

Fair price

A bit pricey

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