Mercedes GLS400 used • 29 cars price-checked by AutoUncle

Market overviewUsed Mercedes GLS400 prices typically range from £39,995 to £68,680, averaging £56,689 (according to fresh market data from December). The most popular Mercedes GLS400 variants right now are Night, AMG line, AMG Line Premium Plus. We have identified 5 cars priced below the market. The average selling time for used Mercedes GLS400 is currently 32 days.

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How much does the Mercedes GLS400 depreciate?

Used Mercedes GLS400

A used Mercedes GLS400 (2023) model loses about £190 per month in value.


Factors that affect the depreciation of a Mercedes GLS400:
- Mileage driven
- Maintenance
- Service history


Depreciation is an important part of calculating the total cost of owning a Mercedes GLS400. In addition to the monthly depreciation of £190, 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 GLS400 cost? Prices, ratings and depreciation by model year

How much does a used Mercedes GLS400 cost? Prices, ratings and depreciation by model year

Model year

Price range*

Avg. Price

Depreciation
(12 mth.)

Cars for sale

2023 Mercedes GLS400

£62,995 - £72,990£66,603-£2,280< 10

2022 Mercedes GLS400

£50,999 - £66,550£59,419-£500< 10

2020 Mercedes GLS400

£51,000 - £54,990£52,990-< 10

2021 Mercedes GLS400

£47,920 - £59,295£52,674-< 10

2019 Mercedes GLS400

£39,990 - £47,920£42,635-< 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: 13 December 2025

Comparison of Mercedes GLS400 variants and prices

Below you can compare prices and depreciation for the 3 most popular Mercedes GLS400 variants. The table is updated daily with data from the market in United Kingdom.

Comparison of Mercedes GLS400 variants and prices

Variant

Price range*

Avg. Price

Depreciation
(12 mth.)

Cars for sale

🏆 The most popular

Mercedes GLS400 Night

£50,999 - £68,680£63,030-£88012

Mercedes GLS400 AMG line

£47,920 - £59,980£53,430-< 10
💰 The budget choice

Mercedes GLS400 AMG Line Premium Plus

£39,990 - £56,037£46,279-< 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: 13 December 2025

Which variant should you choose?

💰 The budget choice

The AMG Line Premium Plus is the cheapest entry point with an average price of £46,279.

Accuracy will improve as more cars from this variant become available

🏆 The most popular

There are the most Night for sale right now (12), which gives you the most options to choose from.

📈 The best value

The Night has held its price stable with minimal loss in value over the past year (-£880).

Mercedes GLS400 (model year 2023) - Price development for the last 9 months and price projection for the next 6 months (March 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 - March
£70,260
£68,240£72,260
Estimate
2025 - April
£70,780
£68,840£72,720
Estimate
2025 - May
£69,820
£67,600£72,040
Estimate
2025 - June
£69,520
£67,460£71,580
Estimate
2025 - July
£69,200
£67,320£71,100
Estimate
2025 - August
£68,900
£67,180£70,620
Estimate
2025 - September
£68,600
£67,040£70,140
Estimate
2025 - October
£68,300
£66,920£69,680
Estimate
2025 - November
£67,980
£66,780£69,200
Estimate
2026 - January
£67,380
--
Forecast
2026 - February
£67,060
--
Forecast
2026 - March
£66,760
--
Forecast
2026 - April
£66,460
--
Forecast
2026 - May
£66,160
--
Forecast

All estimates and forecasts are based on actual market data

Last updated: 13 December 2025

Average Monthly Depreciation

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

Past 12 months

-£2,280

Next 6 months

-£1,820

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Interested in finding a great deal on a used Mercedes GLS400?

Are you considering getting a used SUV? The Mercedes GLS400 is a solid choice. AutoUncle features 22 avalable cars to choose from sourced from various dealership websites and online marketplaces.

What is the price of a used Mercedes GLS400?

A used Mercedes GLS400 costs between £44,995 for the cheapest variant and £68,990 for the most expensive model.

The used car price of an Mercedes GLS400 is determined by a number of factors, the most important of which are year of production, engine size and power, the car's fuel economy, how many miles it has travelled along with the level of equipment in the car.

For example, a younger car with fewer miles on the odometer typically costs more. Likewise, models at the premium end with luxurious features or potent engines tend to come with a more substantial price tag than, for example, an older model with more kilometres driven or with a lower equipment level.

Which trim levels can I choose for the Mercedes GLS400?

The most popular equipment variants for the Mercedes GLS400 are:

When examining the market value of a used Mercedes GLS400, it's imperative to examine vehicles sharing identical trim level. Otherwise, you might draw an inaccurate conclusion about which car to buy.

What fuel configurations can I choose from for the Mercedes GLS400?

The predominant fuel variant for the Mercedes GLS400 is diesel.

It's essential to take into account your driving habits when determining the right fuel type. On average, how many miles do you travel in a week? Do you frequently make short journeys or are your trips generally long?

If you primarily drive short distances, electric, plug-in hybrid or petrol is typically a good fit. For longer commutes, a newer electric car is a good alternative - especially with access to charging. If you have a daily commute over longer distances, a modern electric car can be a great choice - especially if you have access to charging at home or at work. For those who drive long distances and don't have access to charging, diesel cars can still be an option. Be aware that in a number of countries, cities have implemented bans on diesel engines with high emissions.

In which body types are the Mercedes GLS400 available?

On AutoUncle, the Mercedes GLS400 is exclusively offered in the SUV body style. Sport Utility Vehicles, or SUVs, are some of the most popular cars on the market today, thanks to their versatile style and elevated ride height.

Which competitors does the Mercedes GLS400 have?

The Mercedes GLS400 faces stiff competition within its segment.

Most popular choices as an alternative to the Mercedes GLS400

  • Nissan Qashqai
  • Kia Sportage
  • VW Tiguan

With a selection of 10,964 available models on AutoUncle, the Nissan Qashqai clearly stands out as the top alternative to the Mercedes GLS400. Average listing price for the Nissan Qashqai is £16,400.

The Kia Sportage is a strong option in this segment, with 7,280 cars currently for sale on AutoUncle and an average price of £19,998. Another recommended alternative is VW Tiguan with 6,180 cars for sale an average price tag of £22,197.

Looking for a more eco-friendly alternative?

Considering something greener than the Mercedes GLS400? Check out these electric alternatives from the same segment::

Didn't find an electric car to your liking? Explore our entire assortment of electric cars here.

All years for Mercedes GLS400

All trim level for Mercedes GLS400