Mercedes CLS400 Valuation: 15 ads analysed

Market overviewWhat is the fair price of a used Mercedes CLS400? We have 15 for sale. Prices from £23,995 to £34,490. See variants (AMG line, AMG Line Premium Plus) and check the valuation.

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Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

-6%
1 / 4

Used (2019) Mercedes CLS400 AMG line 340 HP | Super price

CLS 4Matic AMG Line 4dr 9G-Tro

  • 2019
  • 22,170 miles
  • Trim levelAMG line
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 340 HP (250 kW)
  • Details
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Super price

£26,990
£28,990
Marketplace
WC1E 7DP London, London
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-6%
1 / 4

Used (2019) Mercedes CLS400 AMG line 340 HP | Super price

4Matic AMG Line 4dr 9G-Tronic -

  • Apr 2019
  • 22,170 miles
  • Trim levelAMG line
  • 2.9L Diesel
  • Sedan
  • Automatic
  • 340 HP (250 kW)
  • CO2189 g CO2/km comb.
  • Details
autouncle-certified

Super price

£26,990
£28,990
Dealer
Oxford, Oxfordshire
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-5%
1 / 3

Used (2019) Mercedes CLS400 AMG Line Premium Plus 340 HP | Good price

CLS4Matic AMG Line Premium + 4dr

  • 2019
  • 51,916 miles
  • Trim levelAMG Line Premium Plus
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 340 HP (250 kW)
  • Details
autouncle-certified

Good price

£26,890
£28,490
Marketplace
EN9 2BL Waltham Abbey, Essex
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1 / 4

Used (2019) Mercedes CLS400 AMG Line Premium Plus 340 HP | Good price

CLS 4Matic AMG Line Premium + 4dr

  • 2019
  • 68,382 miles
  • Trim levelAMG Line Premium Plus
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 340 HP (250 kW)
  • Details
autouncle-certified

Good price

£23,995
Marketplace
MK45 4QR Bedford,, Bedfordshire
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New
1 / 4

Used (2019) Mercedes CLS400 AMG Line Premium Plus 340 HP | Good price

CLS 4Matic AMG Line Premium + 4dr

  • 2019
  • 92,122 miles
  • Trim levelAMG Line Premium Plus
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 340 HP (250 kW)
  • Details
autouncle-certified

Good price

£21,750
Marketplace
AL4 9DA St Albans, Hertfordshire
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-2%
1 / 4

Used (2021) Mercedes CLS400 AMG line 330 HP | Fair price

CLS 2021 | 2.9 AMG Line Night

  • 2021
  • 30,331 miles
  • Trim levelAMG line
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 330 HP (242 kW)
  • mpg7.3
  • CO2191 g CO2/km comb.
  • Details
autouncle-certified

Fair price

£34,100
£34,900
Verified Marketplace
ME59QG, Kent
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-2%
1 / 3

Used (2020) Mercedes CLS400 AMG Line Premium Plus 340 HP | Fair price

- 4Matic AMG Line Premium + 4dr

  • 2020
  • 51,916 miles
  • Trim levelAMG Line Premium Plus
  • 2.9L Diesel
  • Sedan
  • Automatic
  • 340 HP (250 kW)
  • mpg7.2
  • CO2192 g CO2/km comb.
  • Details
autouncle-certified

Fair price

£26,890
£27,490
Verified Marketplace
EN92BL, Essex
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1 / 4

Used (2019) Mercedes CLS400 AMG Line Premium Plus 340 HP | Fair price

CLS 4Matic AMG Line Premium + 4dr

  • 2019
  • 58,900 miles
  • Trim levelAMG Line Premium Plus
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 340 HP (250 kW)
  • Details
autouncle-certified

Fair price

£27,500
Marketplace
LE67 3LH Coalville, Leicestershire
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1 / 3

Used (2019) Mercedes CLS400 AMG line 340 HP | Fair price

CLS 2.9 AMG Line (Premium Plus)

  • 2019
  • 92,410 miles
  • Trim levelAMG line
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 340 HP (250 kW)
  • Details
autouncle-certified

Fair price

£24,849
Marketplace
MK45 4RA Barton Le Clay, Bedfordshire
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1 / 4

Used (2021) Mercedes CLS400 AMG line | Fair price

CLS 2.9AMG Line Night Edition

  • 2021
  • 55,000 miles
  • Trim levelAMG line
  • 2.9L Diesel
  • Coupe
  • Automatic
  • Details
autouncle-certified

Fair price

£31,995
Marketplace
HP12 3SD High Wycombe, Buckinghamshire
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Used (2021) Mercedes CLS400 AMG line | Fair price

CLS Class 2.9 AMG Line Night

  • 2021
  • 30,331 miles
  • Trim levelAMG line
  • 2.9L Diesel
  • Coupe
  • Automatic
  • Details
autouncle-certified

Fair price

£33,800
£34,000
Marketplace
Kent, Kent
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1 / 4

Used (2021) Mercedes CLS400 AMG line | Fair price

CLS 4Matic AMG Line Ngt Ed Pr +

  • 2021
  • 54,035 miles
  • Trim levelAMG line
  • 2.9L Diesel
  • Coupe
  • Automatic
  • Details
autouncle-certified

Fair price

£31,995
Marketplace
BT12 6HU Belfast
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1 / 4

Used (2018) Mercedes CLS400 AMG Line Premium Plus | Fair price

CLS 4Matic AMG Line Premium + 4dr

  • 2018
  • 48,300 miles
  • Trim levelAMG Line Premium Plus
  • 2.9L Diesel
  • Coupe
  • Automatic
  • Details
autouncle-certified

Fair price

£26,489
Marketplace
YO26 8EQ York, North Yorkshire
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1 / 4

Used (2019) Mercedes CLS400 AMG Line Premium Plus 340 HP | Expensive

CLS 4Matic AMG Line Premium + 4dr

  • 2019
  • 26,000 miles
  • Trim levelAMG Line Premium Plus
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 340 HP (250 kW)
  • Details
autouncle-certified

Expensive

£34,490
Marketplace
DH5 0LG Houghton le Spring, Tyne and Wear
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New

Used (2021) Mercedes CLS400 AMG line 325 HP | Rare vehicle

CLS 4Matic AMG Line Ngt Ed Pr +

  • 2021
  • 20,857 miles
  • Trim levelAMG line
  • 2.9L Diesel
  • Coupe
  • Automatic
  • 325 HP (239 kW)
  • Details
£38,250
Rare vehicle
Marketplace
WC1E 7DP London, London
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Showing 1 - 15 of 15 results

How much does the Mercedes CLS400 depreciate?

Used Mercedes CLS400

A used Mercedes CLS400 (2019) model loses about £52 per month in value.


Factors that affect the depreciation of a Mercedes CLS400:
- Mileage driven
- Maintenance
- Service history


Depreciation is an important part of calculating the total cost of owning a Mercedes CLS400. In addition to the monthly depreciation of £52, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly cost.

How much does a used Mercedes CLS400 cost? Prices, ratings and depreciation by model year

How much does a used Mercedes CLS400 cost? Prices, ratings and depreciation by model year

Model year

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

2021 Mercedes CLS400

£31,995 - £34,300£33,07342,183 miles-< 10

2019 Mercedes CLS400

£23,995 - £34,490£27,44451,916 miles-£620< 10

*The 'Price range' column shows the prices at the 5th and 95th percentiles of cars in the current market

The data is based on the cars currently listed on AutoUncle

Last updated: 28 January 2026

Comparison of Mercedes CLS400 variants and prices

Below you can compare prices and depreciation for the 2 most popular Mercedes CLS400 variants. The table is updated daily with data from the market in United Kingdom.

Comparison of Mercedes CLS400 variants and prices

Variant

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

🏆 The most popular

Mercedes CLS400 AMG line

£24,849 - £34,300£30,21830,331 miles-£720< 10
💰 The budget choice

Mercedes CLS400 AMG Line Premium Plus

£23,995 - £34,490£27,70951,916 miles-< 10

*The 'Price range' column shows the prices at the 5th and 95th percentiles of cars in the current market

The data is based on the cars currently listed on AutoUncle

Last updated: 28 January 2026

Which variant should you choose?

💰 The budget choice

The AMG Line Premium Plus is the cheapest entry point with an average price of £27,709.

Accuracy will improve as more cars from this variant become available

🏆 The most popular

There are the most AMG line for sale right now (8), which gives you the most options to choose from.

Accuracy will improve as more cars from this variant become available

📈 The best value

The AMG line has held its price stable with minimal loss in value over the past year (-£720).

Accuracy will improve as more cars from this variant become available

Mercedes CLS400 (model year 2019) - Price development for the last 4 months and price projection for the next 6 months (September 2025 - June 2026)

Monthly price data with average prices and price ranges

Month

Average market price

Lowest market price

Highest market price

Calculation method

2025 - September
£27,280
£24,160£30,380
Estimate
2025 - October
£27,040
£25,040£29,020
Estimate
2025 - November
£27,300
£24,480£30,120
Estimate
2025 - December
£26,660
£24,820£28,500
Estimate
2026 - February
£26,260
--
Forecast
2026 - March
£26,040
--
Forecast
2026 - April
£25,840
--
Forecast
2026 - May
£25,640
--
Forecast
2026 - June
£25,440
--
Forecast

All estimates and forecasts are based on actual market data

Last updated: 28 January 2026

Average Monthly Depreciation

A summary of the past 12 and an estimation of the next 6 months.

Past 12 months

-£620

Next 6 months

-£1,220

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Price checked by AutoUncle

Super price

Good price

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Expensive

Looking for information on a used Mercedes CLS400?

Are you considering purchasing a used executive car? Then the Mercedes CLS400 is a popular choice. AutoUncle has 20 used Mercedes CLS400s for sale in UK sourced from different dealership websites and online marketplaces.

What is the price of a used Mercedes CLS400?

A used Mercedes CLS400 costs between £15,250 for the cheapest variant and £34,489 for the most expensive model.

The cost of a pre-owned Mercedes CLS400 is determined by several factors. Key contributing elements include year of production, engine capacity and performance, fuel efficiency of the car, vehicle mileage not to mention trim level.

For example, a newer model with fewer miles recorded, or a more luxurious variant with a powerful engine, typically commands a higher price than an earlier version with less equipment and higher mileage.

What equipment levels does the Mercedes CLS400 offer?

The Mercedes CLS400 is offered in two separate equipment configurations:

  • Mercedes CLS400 AMG line: Right now you will find 10 cars for sale at an average price of £22,860)
  • [Mercedes CLS400 AMG Line Premium Plus]https://www.autouncle.co.uk/en-gb/used-cars/Mercedes/CLS400/t-AMG%20Line%20Premium%20Plus: 10 cars for sale at an average price of £27,912

While evaluating the cost of a pre-owned Mercedes CLS400, it's crucial to compare vehicles with identical engines and equipment. If not, you might draw an inaccurate conclusion about which car to acquire.

Is the Mercedes CLS400 available in different fuel variants?

The number one fuel selection for the Mercedes CLS400 is diesel.

Price difference between the most popular fuel options for Mercedes CLS400:

We emphasize the importance of considering your driving habits before opting for a particular fuel type. Do you primarily use your car to commute, and is the distance 35 miles or fewer each way?

For short trips, range is rarely a limitation, so electric, plug-in hybrid or petrol can be fine. For longer daily journeys, consider an electric car, especially if you have the option to charge at home or at work. For longer daily commutes, a modern electric car is often suitable - especially if you can charge at home or at work. Despite the rise of electric cars, diesel can still be useful for long journeys and lack of charging options. Note that there are countries where diesel engines with heavy emissions are forbidden from entering city areas.

Are there different body versions of Mercedes CLS400?

The Mercedes CLS400 is available in both coupe and sedan body styles, with the coupe being the more popular choice. Style and sporty driving take centre stage in a coupe, and this body type tends to have a tighter and stronger chassis than, for example, a sedan or an SUV. The model is best suited for people without children and others who travel light. It is usually more expensive than equivalent sedan or hatchback sister models.

How does the price vary depending on the Mercedes CLS400 body type?

What other cars are there in the same category as Mercedes CLS400?

The Mercedes CLS400 faces stiff competition within its segment.

Alternative cars to the Mercedes CLS400

  • Audi A6
  • BMW 520
  • Vauxhall Insignia

The Audi A6 is a great alternative to the Mercedes CLS400. There are 1,828 of this car for sale in the UK right now and the average selling price is £19,999.

The next best alternative car is the BMW 520 with 1,607 cars listed for sale featuring an average selling price of £19,999. The Vauxhall Insignia is the third best alternative. There are currently 1,433 of this car for sale in the UK with an average sales price of £5,995.

Investigating greener options in place of the Mercedes CLS400?

Considering something greener than the Mercedes CLS400? Check out these electric alternatives from the same segment::

Still on the hunt for the right electric car? Explore our entire selection of electric cars here.