Mercedes 300 used • 198 cars price-checked by AutoUncle

Market overviewUsed Mercedes 300 prices typically range from £15,490 to £63,984, averaging £38,719 (according to fresh market data from December). The most popular Mercedes 300 variants right now are AMG line, AMG Line Premium Plus, AMG Line Premium. We have identified 68 cars priced below the market. The average selling time for used Mercedes 300 is currently 14 days.

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How much does the Mercedes 300 depreciate?

Used Mercedes 300

A used Mercedes 300 (2024) model loses about £703 per month in value.


Factors that affect the depreciation of a Mercedes 300:
- Mileage driven
- Maintenance
- Service history


Depreciation is an important part of calculating the total cost of owning a Mercedes 300. In addition to the monthly depreciation of £703, 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 300 cost? Prices, ratings and depreciation by model year

How much does a used Mercedes 300 cost? Prices, ratings and depreciation by model year

Model year

Price range*

Avg. Price

Depreciation
(12 mth.)

Cars for sale

2025 Mercedes 300

£45,450 - £68,710£55,131-£4,82044

2024 Mercedes 300

£31,250 - £50,995£40,277-£8,44047

2023 Mercedes 300

£23,900 - £46,612£37,548-£6,60037

2020 Mercedes 300

£23,346 - £47,999£35,252+£12,72011

2021 Mercedes 300

£21,495 - £43,495£31,344-10

2019 Mercedes 300

£19,390 - £36,500£30,674-< 10

2022 Mercedes 300

£19,520 - £43,345£30,132-23

2017 Mercedes 300

£15,490 - £18,995£17,137-< 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 300 variants and prices

Below you can compare prices and depreciation for the 6 most popular Mercedes 300 variants. The table is updated daily with data from the market in United Kingdom.

Comparison of Mercedes 300 variants and prices

Variant

Price range*

Avg. Price

Depreciation
(12 mth.)

Cars for sale

Mercedes 300 Edition

£57,161 - £61,169£59,884-£80< 10

Mercedes 300 AMG

£41,495 - £75,000£53,830-< 10
📈 The best value

Mercedes 300 AMG Line Premium Plus

£25,499 - £68,710£51,228+£30,28042

Mercedes 300 AMG Line Premium

£21,495 - £49,490£39,127+£19,00039
🏆 The most popular

Mercedes 300 AMG line

£18,995 - £45,995£34,533+£13,88088
💰 The budget choice

Mercedes 300 Premium

£23,995 - £39,495£31,986-< 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

Which variant should you choose?

💰 The budget choice

The Premium is the cheapest entry point with an average price of £31,986.

Accuracy will improve as more cars from this variant become available

🏆 The most popular

There are the most AMG line for sale right now (88), which gives you the most options to choose from.

📈 The best value

The AMG Line Premium Plus has held its price stable with minimal loss in value over the past year (+£30,280).

Mercedes 300 (model year 2024) - Price development for the last 11 months and price projection for the next 6 months (January 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 - January
£52,300
£46,900£57,680
Estimate
2025 - February
£50,700
£46,260£55,140
Estimate
2025 - March
£61,600
£56,360£66,820
Estimate
2025 - April
£55,780
£48,960£62,620
Estimate
2025 - May
£53,120
£48,120£58,100
Estimate
2025 - June
£49,040
£46,980£51,100
Estimate
2025 - July
£48,720
£45,120£52,320
Estimate
2025 - August
£45,920
£42,060£49,780
Estimate
2025 - September
£42,840
£39,800£45,860
Estimate
2025 - October
£46,820
£42,500£51,120
Estimate
2025 - November
£43,860
£39,500£48,200
Estimate
2026 - January
£41,780
--
Forecast
2026 - February
£40,740
--
Forecast
2026 - March
£39,700
--
Forecast
2026 - April
£38,680
--
Forecast
2026 - May
£37,640
--
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

-£8,440

Next 6 months

-£6,220

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On the hunt for a used Mercedes 300?

Are you thinking of getting a used sports car? Then the Mercedes 300 is a popular option. AutoUncle present 90 options gathered from different dealership websites and online marketplaces.

How much does a used Mercedes 300 go for?

Currently, the prices for a pre-owned Mercedes 300 start at £7,000 and go up to £64,534.

A used Mercedes 300 is being offered at different prices determined by primarily five factors: the year, engine size and performance, the car's fuel consumption, vehicle mileage together with the trim level of the car.

For instance, a more recent model with limited mileage, or a premium variant featuring a powerful engine, typically commands a higher price than an earlier version with less equipment and higher mileage.

Does the Mercedes 300 offer multiple trim lines?

Here is an overview of the most popular equipment variants for Mercedes 300, sorted by number of cars for sale and their market price:

While evaluating the cost of a pre-owned Mercedes 300, it's crucial to analyze vehicles having the same engines and equipment. If you don't, you might draw an inaccurate conclusion about which car to acquire.

What fuel types are available for the Mercedes 300?

The principal fuel kind for a Mercedes 300 is petrol.

Available fuel options for Mercedes 300:

  • Mercedes 300 petrol: 75 cars currently available with an average price of £45,181
  • Mercedes 300 diesel: 11 cars currently available with an average price of £41,503
  • Mercedes 300 el: Currently there is 4 cars available on AutoUncle with an average price of £56,248

Your driving tendencies should play a significant role in your fuel type selection. Do you generally drive in city conditions or on open highways and motorways? What is your average weekly mileage count?

If you drive mostly short distances, range is not crucial - so electric, plug-in or petrol are obvious choices. For daily long journeys, electric cars make the most sense if you can charge easily. 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. Bear in mind that diesel engines emitting high levels of pollution are not allowed in cities in a number of countries.

What body types do the Mercedes 300 have?

The Mercedes 300 comes in various body types, stationcar being the most popular. In the UK, estates, commonly referred to as station wagons, are in high demand due to their perfect blend of driving prowess and generous space. Active families often gravitate towards these, as well as SUVs and MPVs, for their versatility.

Price statistics for AutoUncle's selection of Mercedes 300 body types

  • Mercedes 300 stationcar: 54 cars - average price £47,838
  • Mercedes 300 coupe: 15 cars - average price £49,838
  • Mercedes 300 cabriolet](https://www.autouncle.co.uk/en-gb/used-cars/Mercedes/300/b-convertible): 5 cars - average price £16,393
  • Mercedes 300 mpv: 4 cars - average price £56,248

What other cars should I also know and consider?

The Mercedes 300 has multiple competing cars from the same segment.

Top competitors to the Mercedes 300

  • BMW 420
  • Audi TT
  • Mazda MX5

With a current inventory of 1,733 available models on AutoUncle, the BMW 420 stands out as the top alternative to the Mercedes 300. The BMW 420 comes with an average price of £17,750.

The next best alternative car is the Audi TT with 1,042 cars for sale at the moment and with an average sales price of £13,990. The Mazda MX5 comes in as the third most popular choice with an average sales price of £14,695 and 689 car for sale at the moment in the UK.

Considering a more eco-friendly alternative to the Mercedes 300?

Considering something greener than the Mercedes 300? Check out these electric alternatives from the same segment::

Can't seem to locate an electric car that matches your needs? View our complete collection of electric cars here.

All body types for Mercedes 300

All fuel types for Mercedes 300

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