Mercedes CLS400 used • 26 cars price-checked by AutoUncle

Market overviewUsed Mercedes CLS400 prices typically range from £15,500 to £34,066, averaging £25,968 (according to fresh market data from December). The most popular Mercedes CLS400 variants right now are AMG line, AMG Line Premium Plus. We have identified 5 cars priced below the market. The average selling time for used Mercedes CLS400 is currently 48 days.

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How much does the Mercedes CLS400 depreciate?

Used Mercedes CLS400

A used Mercedes CLS400 (2019) model gains about £0 per month in value.


Factors that affect the appreciation of a Mercedes CLS400:
- Mileage
- Age of the vehicle
- Number of previous owners
- Accidents or damage history
- Trim level, equipment, and options


Appreciation is an important part of calculating the total value of owning a Mercedes CLS400. In addition to the monthly appreciation of £0, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly value.

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

Depreciation
(12 mth.)

Cars for sale

2021 Mercedes CLS400

£27,599 - £34,066£32,080-< 10

2020 Mercedes CLS400

£27,490 - £32,995£30,145-< 10

2019 Mercedes CLS400

£22,695 - £35,490£27,447-11

2015 Mercedes CLS400

£15,250 - £16,790£15,884-< 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: 14 December 2025

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

Depreciation
(12 mth.)

Cars for sale

Mercedes CLS400 AMG Line Premium Plus

£22,695 - £35,490£27,847-< 10
💰 The budget choice

Mercedes CLS400 AMG line

£15,250 - £34,066£24,974-£94017

*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: 14 December 2025

Which variant should you choose?

💰 The budget choice

The AMG line is the cheapest entry point with an average price of £24,974.

🏆 The most popular

There are the most AMG line for sale right now (17), which gives you the most options to choose from.

📈 The best value

The AMG line has held its price stable with minimal loss in value over the past year (-£940).

Mercedes CLS400 (model year 2019) - Price development for the last 3 months and price projection for the next 6 months (September 2025 - May 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
£27,280
£24,440£30,120
Estimate
2026 - January
£27,260
--
Forecast
2026 - February
£27,260
--
Forecast
2026 - March
£27,260
--
Forecast
2026 - April
£27,260
--
Forecast
2026 - May
£27,260
--
Forecast

All estimates and forecasts are based on actual market data

Last updated: 14 December 2025

Average Monthly Depreciation

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

Past 12 months

Next 6 months

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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.

All body types for Mercedes CLS400

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All trim level for Mercedes CLS400