Used (2019) Mercedes SL400 AMG line 367 HP | Good price
- AMG Line 2dr 9G-Tronic
- 2019
- 43,000 miles
- Trim level: AMG line
- 3.0L Petrol
- Cabriolet
- Automatic
- 367 HP (269 kW)
- mpg: 9.1
- CO2: 191 g CO2/km comb.
- Details
Good price
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Price checked by AutoUncle
Super price
Good price
Fair price
A bit pricey
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- AMG Line 2dr 9G-Tronic
Good price
SL AMG Sport 2dr Auto
Good price
SL 3.0 V6 AMG Line Roadster 2dr
Good price
SL AMG Line Premium 2dr 9G-Tro
Good price
SL 3.0 V6 AMG Line Roadster 2dr
Super price
SL AMG Sport 2dr Auto
Good price
SL 3.0AMG Line Auto 2dr
Fair price
SL AMG Line 2dr 9G-Tronic
Fair price
SL AMG Line 2dr 9G-Tronic
Fair price
SL 3.0 AMG Sport Convertible 2dr
Fair price
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SLAMG Sport 2dr Auto
Fair price
SL AMG Sport 2dr Auto
Fair price
SL-ClassAMG Sport 2dr Auto
Fair price
SLS 3.0 V6 Grand Edition G-Tronic+
Fair price
- AMG Sport 2dr Auto
A bit pricey
SL Convertible Grand Edition
A bit pricey
SL 3.0 V6 AMG Line (Premium)
Expensive
SL 3.0 V6 AMG Line Convertible 2dr
SL 2LOOK Edition 2dr Auto
Featured deals
Used Mercedes SL400
Factors that affect the depreciation of a Mercedes SL400:
- Mileage driven
- Maintenance
- Service history
Depreciation is an important part of calculating the total cost of owning a Mercedes SL400. In addition to the monthly depreciation of £42, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly cost.
Model year | Price range* | Avg. Price | Median Mileage | Depreciation | Cars for sale |
|---|---|---|---|---|---|
2018 Mercedes SL400 | £32,401 - £39,995 | £36,630 | 30,967 miles | - | < 10 |
2017 Mercedes SL400 | £22,495 - £30,999 | £27,386 | 59,000 miles | - | < 10 |
2016 Mercedes SL400 | £19,990 - £29,990 | £25,868 | 36,375 miles | -£1,380 | < 10 |
2015 Mercedes SL400 | £16,995 - £24,495 | £20,699 | 59,099 miles | -£500 | < 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
Variant | Price range* | Avg. Price | Median Mileage | Depreciation | Cars for sale |
|---|---|---|---|---|---|
🏆 The most popular Mercedes SL400 AMG line | £22,495 - £41,990 | £31,614 | 38,110 miles | -£2,300 | < 10 |
💰 The budget choice Mercedes SL400 AMG | £16,995 - £24,495 | £20,673 | 68,541 miles | -£120 | < 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
The AMG is the cheapest entry point with an average price of £20,673.
Accuracy will improve as more cars from this variant become available
There are the most AMG line for sale right now (9), which gives you the most options to choose from.
Accuracy will improve as more cars from this variant become available
The AMG has held its price stable with minimal loss in value over the past year (-£120).
Accuracy will improve as more cars from this variant become available
Month | Average market price | Lowest market price | Highest market price | Calculation method |
|---|---|---|---|---|
| 2025 - January | £22,460 | £20,060 | £24,840 | Estimate |
| 2025 - February | £22,400↘ | £19,880 | £24,920 | Estimate |
| 2025 - March | £22,760↗ | £20,060 | £25,480 | Estimate |
| 2025 - April | £23,160↗ | £20,380 | £25,940 | Estimate |
| 2025 - May | £22,260↘ | £19,860 | £24,660 | Estimate |
| 2025 - June | £21,900↘ | £19,520 | £24,260 | Estimate |
| 2025 - July | £21,540↘ | £19,200 | £23,880 | Estimate |
| 2025 - August | £21,180↘ | £18,860 | £23,480 | Estimate |
| 2025 - September | £20,940↘ | £17,920 | £23,960 | Estimate |
| 2025 - October | £21,280↗ | £18,400 | £24,140 | Estimate |
| 2025 - November | £21,620↗ | £18,900 | £24,320 | Estimate |
| 2025 - December | £21,960↗ | £19,380 | £24,520 | Estimate |
| 2026 - February | £22,120↗ | - | - | Forecast |
| 2026 - March | £22,200↗ | - | - | Forecast |
| 2026 - April | £22,280↗ | - | - | Forecast |
| 2026 - May | £22,360↗ | - | - | Forecast |
| 2026 - June | £22,460↗ | - | - | 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
-£500
Next 6 months
£500
Price checked by AutoUncle
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Are you considering purchasing a used sports car? Then the Mercedes SL400 is an excellent choice. AutoUncle present 24 options sourced from different dealership websites and online marketplaces.
Currently, the prices for a pre-owned Mercedes SL400 start at £16,995 and go up to £44,950.
The German car is being offered at different prices relying on mainly five factors: year, engine size and performance, fuel economy, number of miles as well as trim level.
For example, a newer model with low mileage or a premium version equipped with a high-performance engine generally demands a higher price than a car from an older model year, with higher mileage and no optional extras.
The Mercedes SL400 is offered in a varied array of trim editions, addressing different driving styles and essentials. The most popular ones are:
As you considers the cost of a used Mercedes SL400, it's fundamental to examine vehicles sharing identical trim level. If not, you might draw an inaccurate conclusion about which car to buy.
The predominant fuel variant for the Mercedes SL400 is petrol.
When contemplating fuel type choices, reflecting on your driving habits is important. What's your typical weekly driving mileage? Are your trips usually short or do they cover longer distances?
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. 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 in some countries, high-emission diesel engines have been banned from entering certain cities.
On AutoUncle, the Mercedes SL400 is exclusively offered in the cabriolet body style. Cabrios and convertibles give the driving experience a new dimension. Thanks to their excellent hoods and weather gear, most models are fit for year-round use these days. Thickener is applied underneath the car to strengthen the chassis in lieu of a roof, which means that convertibles have a tendency to be heavier than normal cars.
The Mercedes SL400 faces stiff competition within its segment.
Most popular choices as an alternative to the Mercedes SL400
With a current inventory of 1,733 available models on AutoUncle, the BMW 420 stands out as the top alternative to the Mercedes SL400. On average, the BMW 420 costs £17,750.
The next best alternative car is the Audi TT with 1,042 cars currently for sale with an average sales price of £13,990. Another recommended alternative is Mazda MX5 with 689 cars for sale an average price tag of £14,695.
When considering an electric vehicle that matches the calibre of the Mercedes SL400, here are some few suggestions:
Can't seem to locate an electric car that matches your needs? View our complete collection of electric cars here.